@jax It sucks you can't subscribe to #PeerTube stuff from #Lemmy. Simply having the ability to pull hashtags into your feed would be a nice touch. Or just letting users subscribe to things via #RSS could help.
I comment on PeerTube stuff from #Friendica but don't see any (dis)like counts and only some of the comments. If the video post is looked at from #Mastodon, it seems to display all the comments, #Pleroma shows the same limited few as Friendica, and #Misskey shows most of the comments seen on PeerTube. But none show any (dis)like counts from PeerTube, the ones they do show are limited to how likes are distributed for that software.
As far as Lemmy votes are concerned, they display and function quite nicely within Friendica. I shows me the same number of both up/down votes as likes/dislikes as I see if I look at them on Lemmy.
Maybe one day somebody will unlock the secret for full interoperability amongst all ActivityPub services. Till then, we're just stuck trying to find ways around the limitations we have.