I very much would like this feature.
Due to file locking.
I am having issues where a backup file is being written to a folder by a process (Macrium reflect) but Syncthing is picking up the new file, before even a 6 minute backup is complete.
Due to this, Macrium, is unable to rename the temp file, to the correct final file name (not a good thing)
It’d be real, real nice if I could have Syncthing schedule times or even a blackout window, so I can say “don’t do anything between these times”