Well, activitypub, the protocol that all these platforms uses is really just a fancy way of transporting activitystreams, a standard for social media posts. AS describes that an [Application, Group, Organization, Person, Service] can [Accept, Add, Announce, Arrive, Block, Create, Delete, Dislike, Flag, Follow, Ignore, Invite, Join, Leave, Like, Listen, Move, Offer, Question, Read, Reject, Remove, TentativeAccept, TentativeReject, Travel, Undo, Update, View] one or more - [Article, Audio, Document, Event, Image, Note, Page, Place, Profile, Relationship, Tombstone, Video]
Oh sharkey (misskey fork) they have a lookup popup, where you can paste any ActivityPub post and it will fetch and display it. Very useful, and if someone shares a link to something Activityoub compatible, it will automatically render under it.
Pages aren't made for blogging, ActivityStreams2 defines some of the post types activitypub can handle, article and page are both different types, articles are for long form writing, pages are for collections of other types of posts.
https://calckey.world/notes/a1kv9u8g33 on sharkey (misskey fork) it shows up and it looks okay.
For the few where it doesn't work at all, those are very specalist platforms, so it doesn't surprise me.
I love mastodon because its actual people I'm following, so I can see whats happening in their lives, in contrast to twitter, which just showed me constant outrage bait and shitposts.
I know, but why are they so big.