Your instance is not blocking that much.
Apparently the Facebook company fights with account mirroring even more than ex-Twitter. Performance of Instagram mirroring will be smaller...
Comment on Mirror Instance for Interactable Archiving
Coopr8@kbin.earth 5 weeks agohmmm... if the search on one of these (Instagram) resolves a username but my client (m.bin on kbin.earth via Interstellar app) can't locate it does that mean my instance has blocked kilogram.makeup?
Kierunkowy74@piefed.zip 5 weeks ago
INeedMana@piefed.zip 5 weeks ago
Maybe you need to wait a bit for federation to kick in?
I don't have links at hand, but from some other questions I know that federation is not "download everything the moment someone looks at another instance". Basically follow something and wait until some new content appears on origin instance. If after that you don't see the content federated, then it's time to start asking around