Which files would be affected?
Mainly dockerstubs. ARM support for ofrak dependencies have greatly increase over the year. Although I'm not finished, it looks like only the tests that deal with the BCC spark toolchain will need to be skipped on ARM. Otherwise everything else appears to have ARM variants.

Does the proposed maintenance include non-doc string functional changes to the Python code?
Yes but not much likely just a couple of pytest.marker.skipif(platform != x86_64) for toolchains that do not support ARM.

Are you interested in implementing it yourself?
Yes