[BXlnt2EachOther]

That doesn't seem to be most people's experience, see sibling posts.

As another data point, I have several manually-uploaded zip and 7z files of my own documents and content, both encrypted and not, and never had a problem.

The majority of my Drive usage by bytes is encrypted backup pack files uploaded via API by Arq Backup or rclone. That's all worked fine for many years.

[glitchc]

Sorry, I may have conflated Gmail with GDrive, my bad.

[BXlnt2EachOther]

IIRC I did get a roadblock attaching a zip file with GMail several years ago.

GMail also complained about direct-attaching a locally-built, unsigned exe file to an address that I'd never corresponded with. To be fair this probably should have caused suspicion :)