I was more thinking how hard it would be to have one server that is both a mastadon and a lemmy instance. I know backend they interact with activpub differently but i was thinking u could probably just serve both lemmy and mastadon api and do some dodgying up where/if they interfear with eachother. Not sure how u would deal with WebFinger tho.

I would test it myself exept Takahe seems to use django and PieFed is flask cos of cause we cant have Takahe also use flask that would make life to easy.