The range of New Zealand shows available isn't huge and includes only a couple of releases from before the 1990s. With rise of streaming services it would be a brave person indeed to predict many more shows will get a physical format release unless the market for local tv shows skews nostalgic older folk who love a murder mystery but can't get the hang of streaming services, though I haven't found a whole lot of older shows on local ondemand services either.

Title
800 Words (2015-2019)
A Night At The Classic (2010)
A Personal War (2011)
A Tall Long Faced Tale (2008)
Adventurer (1986)
Adventures of Massey Ferguson (?)
Adventures of the Black Stallion (1990-93)
Almighty Johnsons, the (2011-13)
Amazing Extraordinary Friends (2006 - 2010)
An Angel at My Table (1991)
Annabel Langbein: The Free Range Cook (2014-2017)
Back of the Y Masterpiece Television (2001-2)
Bad Seed, The (2019)
Being Eve (2001-2003)
Billy (2011)
Billy T James Show (1981-88)
Billy T James Show (1990)
Blakey (2011)
Bliss - The Beginning of Katherine Mansfield (2011)
Blue Rose (2013)
Bread and Roses (1993)
Bro'Town (2005-)
Brokenwood Mysteries, the (2014-
Bungay On Crime (1995)
Burying Brian (2008)
Buzz and Poppy (1998)
Buzzy Bee And Friends (2009)
Captain's Log (2001-2)
Cave In (2003)
Chasing the Ghost
Chef on a Mission (2010ish )
Children of Fire Mountain (1979)
Children of the Dog Star (1984)
CKC: Cool Kids Cook (2007)
Clare (?)
Coasters (2013)
Colin McCahon - I AM (?)
Country Calendar (1966-Now)
Cover Story (1995-96)
Cuckoo Land (1986)
Cult, The (2009)
CUZ FM (1989-90)
Dark Knight (2000)
Dead Lands, the (2020)
Diplomatic Immunity (2009)
Doves of War (2006 )
Duggan (1997-99)
Ends of the Earth (2007)
Enid Blyton Adventure Series (1996)
Enid Blyton Secret Series (1998)
Facelift (?)
Flight of the Albatross (1995)
Flight of the Conchords (2007-09
Forgotten Silver (1995)
Funny Business (1987-89)
Get Fresh (2010)
Getting Your Body Back (2006)
Giggles, The (2009)
Girl vs Boy (2012)
Global Radar (2011)
Go Girls (2009-13)
Go Show, The (?)
Gold (1991)
Golden (2011)
Grasscutter, the (1988)
Gulf, The (2020-now)
Hairy Maclary (1996)
Harry (2013)
Haunting of Barney Palmer, The (1987)
Heart of the High Country (1986)
Heartland (1992 - 96)
Hercules: The Legendary Journeys (1995 - 99)
Here to Stay (2007 - ?)
Hillary: Everest and Beyond (2015)
Holly's Heroes (2005)
Horse of the Year (2009 - 2018?)
Hothouse, The (2007 - )
Hunger for the Wild (2006)
Hunter's Gold (1976)
Ice (2007)
Insiders Guide to Happiness (2004)
Insiders Guide to Love (2005)
Intrepid Journeys (2005)
Jaquie Brown Diaries, The (2008-09)
Journeys in National Parks (1987)
Kaitangata Twitch (2010)
Keeping Up With the Kaimanawas (2015)
Ken's Hunting and Fishing Show (2007)
Kidnapped (2005)
Killan Curse, the (2006)
Kiwi Kitchen (2006)
Lawless (1999-2001)
Legend of the Seeker (2008-2010)
Let's Get Inventin' (2006)
Line of Fire (2018)
Lion Man, the (2004 - 2008)
Living Room, the (2002-06)
Lost Children, the (2006)
Lost World, the (2001)
Luminaries, The (2020)
Maddigan's Quest (2006)
Magical World of Margaret Mahy, the (1994)
Maiden Voyage (2004)
Margaret Mahy's Rumbustifications (2011)
Marlin Bay (1992-94)
Mataku (2002-2005)
Michael King - History Man (2004)
Milly, Molly (2008-?)
Mirror Mirror (1995)
Monstors Christmas, the (1981)
Moon TV (2002 - 2010)
My Kind of Place (2010)
My Life Is Murder (2019-now)
Nancy Wake: The White Mouse (
Nearly No Christmas (1982)
New Adventures of Black Beauty (1990)
New Zealand on a Plate (2010?)
New Zealand Wars, the (1999)
Nigel Latta (2014)
Nights in the Gardens of Spain (2011) aka Kawa
No Good Calling for Mum (1994)
No Latitude for Error (1994)
North (2011)
Nothing Trivial (2011-2014)
NZ Detectives (2010-11)
NZ Idol (2004-)
Ocean Zoo (2004)
Off the Radar (2007)
Off the Rails - A Love Story (2005)
One Lane Bridge (2020)
Orange Roughies (2006)
Our Heritage (1981)
Our New Zealand (2003)
Outrageous Fortune (2005-2010)
Piece Of My Heart (2009)
Piha Rescue (2004)
Pirates of the Airwaves (2014)
Politically Incorrect Guide to Grown Ups, the (2011)
Politically Incorrect Guide to Teenagers, the (2011)
Politically Incorrect Parenting Show, the (2011)
Pop-Up: Imagine with Rufus (2010-11)
Pretender, the (2005-08)
Pulp Sport (2003 - ? )
Puzzle Inc (2005ish)
Racing for Possum (2005)
Radar's Patch (2010)
Rage (2011)
Raider of the South Seas (1990)
Real Middle Earth, the (2004)
Rude Awakenings (?)
Rugged Gold (1994)
Safehouse (2012)
Sam Hunt: Purple Balloon and Other Stories (2011)
Secret Agent Men (2003)
Semisis, the (1998)
Seven Periods with Mr Gormsby (2005)
Short Poppies (2014)
Shortland Street (1992-Now)
Siege (2012)
Sir Edmund Hillary 1919 - 2008
Sitting, The (2011-2012)
Sounds, the (2020)
South (2009)
Spartacus (2010-2013)
Sports Cafe
Staines Down Drains (2006, 2011)
Step Dave (2014-2015)
Straight Forward (2019)
Strip, the (2002-3)
Super City (2011-2013)
Suzy's World (1999-2003)
Takapu: The Gannet of the South Seas (2003 - ?)
Tankbusters (1970)
Telly Laughs (1996 - 98)
That's Country (1976 - 1983)
The Investigator (2008)
This is Not My Life (2010)
Tiger Country (1998)
Tiki Tour (2011-?)
To Sir With Love: A Tribute to Sir Howard Morrison (2008)
Tomb of the Unknown Warrior (2004)
Top of the Lake (2013)
Topless Women Talk About Their Lives (?)
Topp Twins (1997)
Tribe, the (1999-?)
Typhon's People (1993)
Under the Mountain (1981)
Under the Vines (2021-)
Underbelly NZ: Land of the Long Green Cloud (2011)
Until Proven Innocent (2008)
Welcome to Paradise (2007)
Wellington Paranormal (2018-Now)
Westside (2015-17)
What Lies Beneath (2006)
What Really Happened: Votes For Women (2012)
Wiki The Kiwi (2013)
Wild South (1981-97)
Willy Nilly (2001-2003)
Wonderful World of Fred Dagg, the (1975/09/30 - ?)
Worzel Gummidge Down Under (1986-87)
Xena: Warrior Princess (1995-2002)
Young Hercules (1998-99)
Zip and Mac (2008ish)
Zoo, the (1999-?)