Having the same issue.
Followed
https://www.digitalocean.com/community/tutorials/how-to-set-up-an-openvpn-server-on-ubuntu-18-04 to set everything up and connection works fine with ubuntu but can't get access on Android 10 (Pixel 1) with OpenVPN Connect V3.0.7.
@DJFinsletown have you solved the issue in the meantime?
Thanks, Cheers B