With Universal Clipboard & iCloud sync I use my iPad and iPhone together a lot, e.g research on the phone, copying text passages to iPad.
What I really miss is a backup solution like Time Machine. I’ve gone paperless for over a decade, and wouldn’t want to lose all the scanned documents. Playing around with (manually and periodically) copying files from iCloud to OneDrive, but that’s clunky and misses some data (like contacts…). So I’ll keep my Mac mini for backup purposes for the moment. Have a work issued windows machine for non-personal computing.
Yeah windows is still a non ecosystem, very legacy without Android partnership with Samsung device specifically.
OneDrive should have a setting on iPadOS to auto sync your media/content. Look into that.
You may have to use Outlook for iOS to sync your contacts into the windows work PC (if you’ve signed in using the same account that you have access to via Exchange Online (O365). Again you’ll look into settings for contacts sync. A word of caution: since your windows world is managed by your work place it’s possible when you leave the exit process is to purge your content and contacts, it’s possible that May purge all contacts including sync personal contacts (if sync is no directional), personally I’d keep them separate as some business May not allow you to export internal business contacts nor retrieve why is synced. Always remember ideas and content you’ve submitted to the business is considered property of the business.