I am with Armbian (ubuntu 18.04):
Linux rockpi-4b 4.4.213-rockchip64
and when I installed chromium and tried to login gmail, I got below:
Couldn't sign you in
This browser or app may not be secure. Learn more
Try using a different browser. If you’re already using a supported browser, you can refresh your screen and try again to sign in.
The chromium version info:
Version 80.0.3987.163 (Official Build) Built on Ubuntu , running on Ubuntu 18.04 (64-bit)
Tried chrome UA