I used Dropbox for file sharing between Apple devices rather then iCloud as I found it faster when trying to push files quickly between Mac-Win.
I have given up completely on the idea of using Macs and PCs in the same work environment. You constantly deal with issues either side seem to have built in just to avoid such a “cooperation”. Working like that had way too many obstacles and troubleshooting.
I found migrating things that needed Windows from an actual PC I to a Parallels VM on my main work Mac was the best compromise on the end.