@fisunov@mastodon.online In addition to fedibird.com, there is nightly.fedibird.com. For personal servers, it is adopted by md.korako.me.
In addition, some servers have individually merged hashtag follow functions and so on. The largest is qoto.org. Others include dtp-mstdn.jp, mstdn.f72u.net, and mstdn.omisosiru.net.
Fedibird as a fork does not yet have a release tag. I think there will be more servers after the release.