also, reddthat was mentioned, but another downvote disabled instance I know of is lemmy.one. There’s also beehaw.org, but they keep considering total defederation or moving to something other than lemmy, so maybe not the best choice at the moment.
Only bringing it up because I think all three do not have open registration now, only signups by approval, so nothing is guaranteed. Though you probably have a good chance on reddthat with why you’re moving over.
There are some other instances as well, and if you look about hard enough there’s a github (?) page that has a table with all the instances and their policies, including a column for whether downvotes are enabled.