by sgosnell » 2020-10-11 20:39
If the hardware is very new, it may require a newer kernel as well as firmware, and that is available in the Buster backports. Can you boot to a recovery console? If so, you can put the newer kernel and firmware (not just the one you mentioned) on a USB drive and install them with dpkg, then reboot.
Take my advice, I'm not using it.