Here is the critical point: The V20A is a board-level marking, not a chipset variant. The operating system only needs the generic RT3090 driver.
You will see something like: PCI\VEN_1814&DEV_3090&SUBSYS_30901814&REV_00 ralink rt3090bc4 v20a driver
“The RT3090 is cheap, dirty, and obsolete. But its one strength is that no one listens to it anymore. So I’m leaving a few nodes active in the sewers and substations. If the big net ever falls—if the fiber gets cut, if the satellites go dark—power up a legacy card. Tune to channel 1. I’ll be there. Not as a backup. As a promise.” Here is the critical point: The V20A is
If the above fails (common on kernels >5.15), you may need to patch or compile an older rt3090sta driver. This is not recommended unless you’re comfortable with kernel builds. I found a community fork here: [link to GitHub, if available]. But its one strength is that no one listens to it anymore