Sync not working between IOS and PC

Things I have tried

I’ve read through every help guide, but they seem to be referencing not paid versions of sync mostly. Im paying for sync through obsidan.
I have reconected the vaults multiple times.

What I’m trying to do

Im trying to have my sync work between my iPad and PC. I also have my iphone connected, but I am not as concerned about that.

Sync was working for a while, but randomly last week, i noticed a few notes not getting synced over.

Is your iOS vault also stored in iCloud?

Im not sure, I originally set the sync up using the obsidan service, and didnt configure anything within icloud.

It was syncing back and forth before this past week though.

It seems like its syncing from PC to iPad, but not iPad to PC.