I know this is on at least some if not all of the app developers roadmaps but unfortunately it's going to take some time since most of them are simply working on getting a working app out the door right now. If you have any developer chops then you should definitely submit some pull requests or get active in the Matrix chatroom to help make those features a reality faster.
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I wish I had some developer knowledge, more of an artist, and that's of no use here. At least people are aware of the issue. With no API for Kbin as yet, the apps will be further away I guess? I can wait, still very early days here.
For lemmy there is already an Issue open on Github. It's a popular request, so I'm sure it'll be added soon.
https://github.com/LemmyNet/lemmy/issues/818
I couldn't find something similar for kbin though: https://github.com/ernestwisniewski/kbin/tree/develop
However it's also possible that it'll be implemented on an app level. So far there is no such ability in the apps I've tried.