I don't know if it can be usefull informations:
Aida detect only the card in the first slot, 1st slot used by Windows to boot.
In my case, after machine boot I can close AIDA64, desactivate my 9060Xt with windows peripherals manager to keep only the 7900xtx active, and relaunch AIDA64,
Result is worse, no more Clock or Gpu utilization available.
My bios is configured to use "PCIE-2 Initial Display" (even with that windows boot using GFX in First PCIE)