I can not find an entire directory. I do not remember if I deleted it or not or if something went wrong. Is there some log to check?
There is a “Recent changes” button in the UI, which shows last 100 or so changes (it it’s in memory and lost on restart).
Other than that, not really. There are -audit or -verbose command line switches which would log more stuff to the logs, but you can’t do that retroactively.
Just in case someone lands here, this ended up being me forgetting that I had another sync location. So just me being dumb. Good to know about the log.