I thought one of the advantages of the Fediverse was to have one account but access to many services. Is this possible just not common? I already have a Lemmy account and Mastodon and I didn’t want to start making more just to try out the other services.
It’s not possible with the current approach of server-centric ActivityPub software. In theory, you can have one ActivityPub account to interact with all the other services, but in practice what happens is that the different server creates a new one internally and does not give you access to the private key.