Thanks for the response! I'm sorry to hear that a core contributor vanished like that. Hopefully (s)he's allright and just needed to delegate time differently. And as long as there's at least two of you who feel somewhat dedicated to the project, even if you cannot always be active, that's great. :)
It reminds me of the old proverb that if you want to go fast, walk alone, if you want to go far, walk together. If Mbin can continue at a sustainable pace, where you're not afraid to take time off when you need it, I have no doubt it can go far. :)
Going to mastodon.social and searching for 5teverin0@pxlmo.com in the search field, I see posts going back to August 21 just fine from there. So it's not clear to me what is not working?
Federation of post is not retroactive - if you search up yourself from another instance you should find your profile, but you might not see your old posts. If you follow yourself, all future posts will be federated.