Spectator Survival
This fabric mod adds commands.
Commands:
/c [<target>] - change the gamemode to spectator of the target, if no target was given change your gamemode to spectator
/s [<target>] - change the gamemode to survival of the target, if no target was given change your gamemode to survival
/tpto [<destination>] - tp yourself to a destination, player, without op
/tpto [<target>] [<destination>] - tp a target, player,, to a destination, player, without op