does this export as a readable file?  Have 500+ waypoints and trying to locate one that is not pinned

@Cofet absolutely. Currently it's very rudimentary and simply exports ALL waypoints from a map even if you weren't the player who created them, since waypoints are actually saved on the server. When my waypoint import function runs, it'll change every imported waypoint to be "owned" by the the person who ran the command. So in a way, it's possible to share waypoints like that, though it's kind of a clunky way of doing so.

Also, there is de-duping logic, so you shouldn't have to worry about importing shared waypoints creating the same waypoints in places they already exist :)

Could this also share waypaints between players?

Yup, I am aware, I just didn't have a recent enough backup to want to fully switch to - I just wanted the waypoints, hence the motive for this mod :)

1.17.0-rc.7 fixed the reason why all existing waypoints were removed