Federate images in comments
Is your feature request related to a problem? Please describe. Currently, attaching images in comments to threads only federates to microblog stuff at most. They aren't visible to e.g. Lemmy users.
Describe the solution you'd like
Send the image embedded in the post as a fallback with 
Describe alternatives you've considered Drag Lemmy backstage and take its head off
The problem with additionally adding the embedded  is that it actually correctly federates from mbin <-> mbin. So we could show the representation differently for lemmy servers, but I don't know if I would like it. If lemmy does not support images in comments it is an issue in their implementation. I would ask you to additionally to this issue open up one on the lemmy side and link it to this one here.
The Lemmy issue is https://github.com/LemmyNet/lemmy/issues/2456.
Seems to be fixed in the lemmy code