The only use case of mine that's not solved by keepass is creating passwords on two separate machines without a direct connection, and merging them later.
I solve this by Syncthing running on all clients. Very rarely do I ever have a problem with conflicts. Only if I add a new pass while my phone is offline and then make another edit on my computer would there be an issue. I think it only happened once, and that was because I did it on purpose to see what happened.
Turns out syncthing creates a .conflict file and then I tell keepassxc to do a merge on the two files and then we are back to normal.
