There is something like that on most Mastodon pages where if you are viewing it just in your browser rather than from within your mastodon account, you can click Follow and it will ask for the server name you want to follow it from, so you have to enter your server name, then it will auto-open it in your Mastodon account for you.

I don’t know that there’s much more anyone could do than that, since any given server you are viewing has no idea what various fedi accounts you may have. That’s kind of what “decentralized” means–there’s no central database keeping track of all your accounts.

Oh, to browse all the posts rather than just one account’s, go to https://pixelfed.social/web/explore which should show pretty much everything. (that’s the main server with the most users by far, and any other PF servers are federated with it so most of theirs should show up there as well)

We feel good.

Yes, you can follow a pixelfed account from your mastodon account and see their posts in your feed. Paste the url of their page into your mastodon search to bring up their profile, then you can view their posts and/or follow them.