hi,
rclone mount, make a remote look like local storage.
so you can use any sync tool.
and rclone is going to add a bi-sync feature to rclone, nothing to do with rclone mount
https://github.com/rclone/rclone/issues/5674
and @jwink3101 has these
https://github.com/Jwink3101/syncrclone
Beta Testers Wanted: New bi-directional rclone wrapper