Sadly, Diaspora has historically been a bad actor in the space, when it comes to supporting other protocols, or helping other platforms adopt their own.
Things really slowed down in the early 2010’s, with the departure of the original core team, and community development has kind of been stuck in a “life support mode” for nearly 9 or 10 years now. Some big features are coming down the pipe, but the attitude of “we don’t have developer resources to support that right now” has slowly mutated into a mindset of “we will never support something not made by us”.