Not sure whether the generic Debian kernel is working at on this SBC with the device tree (from a specifically patched Quartz64 kernel), but worth giving a try.
Ah I see the Bookworm Linux 5.19 kernel has device trees for all three Quartz64 variants, so that one should work. Sadly it has not yet been merged into Bullseye backports, so a little nasty to apply in a way that upgrades work.
Our current beta btw provides a new firmware package with Linux 6.1.0-rc1 and enabled onboard WiFi. Sadly still now br_netfilter module . I’ll open a PR at the repo to have this enabled, but e.g. I did the same for WireGuard and that got no attention at all.