iOS 13.4.1 on ipad not filing email in folders

Aloha,

I have three Apple devices (Ipad 12.9, iPhone 11 Pro, and IMac 27”) that I use three email accounts on. Up until late January, all three devices would sync up and move emails to folders in one of my Gmail accounts. Since late January only my iPhone and my iMac will move mail to my gmail folders. I will move emails on my iPad, but going back to either iPhone or iMac, emails that I thought I had moved will still be in my Inbox? I use my iPad 80% of the time. Would be grateful for any assistance in figuring this out.

Mahalo in advance.