https://www.youtube.com/watch?v=qgPUxn5k1vE
https://www.minecraft.net/en-us/article/test-the-new-player-locator-bar
This upcoming feature needs OneBar support. Ideally I wouldn't even recreate it (like #5, at least in the beginning), just move it somewhere else like top edge, above OneBar (like entity health) or below OneBar (though that could introduce flickering...).

Possibly even overlaying OneBar? https://www.youtube.com/watch?v=0KWTMbEJvDc