Hi David;
I suspect that you are referring to PB 2019 R3 build 2803 and PowerServer 2020 build 2803.
While PS 2020 is now deprecated, we are trying to support these two product releases until 2026.01.22.
That being said, the support for iOS and Android covers the O/S versions as listed in the product specifications.
FYI: https://docs.appeon.com/ps2020/release_bulletin_for_ps/system_requirements.html
Any new devices and/or O/S versions may not supported. That being said of course, we will "try" to accommodate newer releases of those where possible but, it might not be feasible if a new release of PB & PS is required vs a "patch".
HTH
Regards ... Chris