Comment:

The way I read the build instructions you are using a Docker image that already contains QEMU for 32 and 64bit ARM.

Is there a reason you only build GNURadio for linux-aarm64, but not for linux-arm?

Although many modern ARM devices, like Raspberry Pi's, are 64bit, many Linux distros are prinmarily supporting 32bit on them [1] [2], so it would be really helpful to have a 32bit build to run GNURadio on them.