You can't force Twitter and Facebook to federate.
And Fediverse (ActivityPub) applications like Mastodon, Peertube, have designs that make it less than ideal. See my short list of gripes with Mastodon in the comment replies in the following post:
Mastodon saw record number of downloads after Musk’s Twitter takeover #87933
I have similar gripes with the Fediverse. My conclusion after using it for a few years is that it is at best a stopgap between centralized platforms and Nostr (or something similarly decentralized). Unfortunately, Nostr clients are not yet ready for the general public to use.
I really should set aside time to work on the Nostr client I started a few months ago.
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See also the following post, found here on SN:
Mastodon gained 70,000 users after Musk’s Twitter takeover. I joined them #89189 https://www.theguardian.com/media/2022/nov/01/mastodon-twitter-elon-musk-takeover
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