Ah, permissions chicanery. Had to deal with that with connecting a Switch 2 controller with a WebUSB enabler. To be fair, once you add the right udev rules (it is a bit of a pain, yes), it should work for any other devices of the same type (I think it's any with the same USB ID so like same manufacturer and model? Don't quote me on that though). Still, I wish Chromium (since Firefox as far as I know still doesn't support WebUSB) could sort it out by itself (like just have an "allow" button rather than writing udev config files yourself) or at least be a bit more helpful in pointing you the right way with a helpful error message.

You do have to get used to weird edge cases like these throwing a spanner in the works, just like you have weird stuff on Windows (trying to get some older Android devices to communicate in fastboot mode in Windows makes me feel like Odysseus).

Asking around and screwing around usually gets you places though. Eventually you find something.