Only for Lemmy. Not natively for Kbin, although you can access it via federated Lemmy instances.

One of the legal advice subs – I can’t remember which – was going forward requiring post approval from mods because they value community safety. But as they are unpaid volunteers they estimate it could take up to 14 days for post approval.

Artemis is going to be cross platform I’m pretty sure. Which is good. On Android, Jerboa is okay but still kinda rough.