I have Enpass on my iPhone, MacBook Pro 16, and iMac 2020 with OneDrive sync.
Repeating restarting the program will eventually succeed in sync, but it actually doesn't sync.
I had 386 items, created one on iPhone yesterday, and my mbp shows 387 items, don't know when it updated, but my iMac shows 386 items even though it says it synchronized a few seconds ago.
I'll try another cloud service as it seems OneDrive had been a problem in the past.
edit: I changed to iCloud and every device syncs smoothly.