Also an idea that requires more patience, share posts from here to your contacts elsewhere. That's specially practical if it's some image post (like memes) and the platform has good link preview display.

Also also, not ideal and much more of a slow process, but if someone from your contacts is on Threads or Bluesky, respectively suggest to him/her to activate ActivityPub integration, and suggest to follow Fedi Bridgy. Both would be microblogging-oriented, but there should be some degree of propagation from threaded posts over to microblogging platforms.

Also³, as I suggested in a separated comment, integration between ActivityPub-compatible platforms varies depending on each engine involved, so in Lemmy for example, if something is seen as a channel, maybe people could seek to follow and interact with it too?