Wefwef supports this. It’s quite nice.

I think Lemmy not having it’s probably due to the fact that there was always so few comments on post, it wasn’t really necessarily. There are a bunch of apps in development from Redditch 3rd party developers that had it

I have been using jerboa almost exclusively. It seems to have support for that since I joined 3 or so weeks ago

wait what some apps don’t support comment collapsing?

it was the first feature I tried to add in my client