The only thing about Linux IS that its a kernel. Its not like BSD where all the tools get developed together and released in the same edition, Linux is a kernel, full stop. Anything built on top of the Linux kernel is a Linux distro.

Can you name something other than the kernel that would be considered an essential element of a Linux distro and not available on android or BSD?

Its always been GNU+Linux, even stallman acknowledged its a separate thing and distros without GNU or glibc do exist on desktop too.

Obviously its just for the challenge since pi5 has 8gb models aready

Android is a Linux distro, just because its not gnu or running whatever subset of features a desktop Linux might have doesn’t make it any less of a Linux distro.

The real question is what do you consider a part of a “Linux disto” that currently isn’t available on android?