I think I’ve found a relatively nice solution for #FediLinks in #Conversations_im.
You can put web+ap URIs into a message (or room description) and ideally a click on those will open your Mastodon client. However if no installed app supports those (the only app that I’m aware of is Fedilab) Conversations will open a browser instead.
Currently no app will create web+ap links but it is fairly easy to handcraft them.
cc @SoniEx2