There’s nothing special, it can be replaced with any TOTP/HOTP implementation. In particular, oathtool is supplied in most distros (it has only command line interface, probably there are also some GUI tools in your repos). However it does not support JSON key format that is provided as QR code for mobile 2FA apps. You have to copy and paste values from it manually.
However this will likely violate your employer’s security policy. The point of 2FA is that secret key is stored on a separate device, so that it cannot be stealed together with your password.
I recommend to try other Android apps on your phone. I use FreeOTP+ and have no problems with font readability. Some of my collegues use AndOTP and like it.