Settings -> Devices & connections -> Controllers & headsets -> (Select your controller) -> (Three dot menu) -> Update now.
(Blanked out the reflection of my garden)
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Not just Xbox controllers, ~all controllers.
Nintendo hides them really well from you but there’s a menu options to go look for updates. My two 8bitdo controllers get quite regular updates, they have their own update tool for it.
This doesn’t look like Arch Linux.
What’s the benefit of updating a controller?
Updating to BLE and breaking old wireless adapter support, looking at you Xbox