Kierunkowy74

Both Mastodon and Lemmy (and Mbin) expose an API, which can be used to develop an alternative client (for e.g. mobile). This allows even for several alternative front-ends, like Elk, Phanpy and pl-fe for Mastodon (and Pleroma and Akkoma and some Misskey forks and several projects for single-user-instances - all of these extend Mastodon API in some way), or Photon, mlmym and Blorp for Lemmy. GoToSocial (made for single-user-instances) does not provide any webUI, pointing to these alternative front-ends. Lemdro.id even swapped its interface for Photon.

Mastodon clients list (scroll down) and Lemmy clients list

Technically one is able to develop a Fediverse instance software which would provide both Mastodon API (likely with extensions) and Lemmy API. With e.g. microblogging (and maybe events?) used via pl-fe and Threadiverse content more easily available via Photon or Blorp? But I am not aware of any project like that.

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…

Twitter mirrors
Instagram mirrors
Reddit mirrors for posts

Corporate social networks generally don’t like being mirrored by a competition and actively fight with these.

Bluesky was being mirrored like this by Bridgy, but as it is a two-way bridge and Mastodon users did not expect their data leak to another network they bullyed Bridgy dev into making it opt-in.

There are more issues to mass-mirroring content from outside and I hope others will tell about them.

Exactly like that.

You may want to check the list of instances defederated by your PieFed instance out then as it may by much longer that on lemmy.ca…