I met the main developer at the CCC congress two days ago, and we talked about it a bit. The problem is that he is only a backend developer, and the front ends for Friendica are a really old and messy codebase.
I think the best option for Friendica would be to fork one of the available alternative front ends for Mastodon and adapt it for the additional functionality of Friendica. But they need a frontend dev to help out with that.