Let’s not give up yet, could you try the beta version of Volumio with Debian buster?
It is not an official version, but has all the new drivers and firmware needed for current x86 configurations.
You can download it from this page: Volumio X86/ Debian Buster debugging party (BETA)
The new Volumio version for x86 (32and 64bit) are based on this one and going to be released soon.