Labour in Merton is actually divided into the two separate parliamentary constituencies.
To the west of the borough is Abbey, Cannon Hill, Hillside, Merton Park, Raynes Park, Village, Wandle, West Barnes, Wimbledon Park, Wimbledon Town & Dundonald all covered by Wimbledon Labour.
To the east of the borough is Colliers Wood, Cricket Green, Figge’s Marsh, Graveney, Lavender Fields, Longthornton, Lower Morden, Pollards Hill, Ravensbury, St Helier covered by Mitcham & Morden Labour.
The Labour manifesto was published early, illegally linked to in a Merton Council branded email using addresses harvested from the Electoral Registration Office (ERO).
It appeared 
in the email titled “Community-led plan Merton 2030 has launched” on 11 Febraury 2021 from
Merton Council <mertoncouncil@public.govdelivery.com>
See if you received a copy, you probably did if you registered to vote online or completed the Official Household Information Response to the yearly electoral roll letters.
If you are in one of the three (Abbey, Cannon Hill or Wandle) Wimbledon target wards then the Labour policies are:
Merton Labour On Your Side_ Our Policy priorities 2022-26 - Wimbledon Labour PartyIf you are in the Mitcham & Morden constituency (With Siobhain McDonagh as your MP, rather than Stephen Hammond) then your policies are a blank page.
http://www.mmlp.org.uk/about-us/our-policies
Websites:
Wimbledon constituency https://www.wimbledonlabour.org.uk/
Mitcham & Morden constituency http://www.mmlp.org.uk/