Deleted folder in Drive - file info still visible on my.avast.com

My school administers my Google Drive and deleted my backup folder at some point. My photos and videos still show up under my old device’s backup on avast.com- including thumbnail images. does this mean they still exist on Avast servers? If so, can I have them restored to one of my other Drive accounts before Mobile Backup goes away for good?

It takes a while before the info in your account is updated.
The files are gone.
Just create a new copy from the original files.

But if it is your Google drive, how come the admins have access to it?