Add the option to enable the Boss Bar to appear only when the player holds a compass, the option for it to appear showing the coordinates every time the player holds a compass in their hand/offhand for an F3 screen alternative, and the option to only save Locations using Lodestones, with the player being able to asign a name and color to the Lodestone.
By Right /Left Clicking while holding a compass, they would be able to circle through different saved locations, this way, they would do this things in game, and not using commands.