🤷♂️likes don't federate between instances that aren't the origin and the instance that does the "like". I've been knowing this for awhile but I thought you were saying it was specifically mastodon. However, that is how it works, whether it's just mastodon or not was what I was questioning.
Edit: for example, you can see proof of this here on this view of the post from mastodon.social. no like 🤷♂️
With Meta. I was under the impression that they would just build their own premium paid features and that wouldn't federate because it's not built into native AP and if they built a "modified AP" it wouldn't be worth it because literally nobody else would use it, I wouldn't think. Maybe that's just me though.