in reply to Mark

Mastodon/Bluesky bridge should work the same for Friendica.

But there is more. There is a Friendica-specific "bridge" to Bluesky, which connects your Bluesky account to Friendica. This makes Friendica a Bluesky client, so you will be able to interact with any Bluesky account (not only these who opted in to federation to Mastodon) - as you will interact with them as a Bluesky user.

Go to Settings → Social Networks. Do you see "Bluesky Import/Export"? If not, ask your admin to add it.

The same thing can be possible with Tumblr (which does not even federate!)