Comment 1 for bug 1894622

systemd-resolve has been deprecated in favor of the new name 'resolvectl', but the resolvectl binary does provide backwards compatibility with systemd-resolve (which is symlinked to resolvectl), so there should be *some* kind of manpage for it, as long as that backwards compatibility symlink is provided.

It looks like upstream, the systemd-resolve manpage was completely replaced by the resolvectl manpage in commit b69f810c8a2ece4e44c1b1898e237bb671b36a21. This should probably be discussed upstream to restore some kind of manpage for systemd-resolve compatibility mode, instead of just in Ubuntu.