Settings -> Devices & connections -> Controllers & headsets -> (Select your controller) -> (Three dot menu) -> Update now.
(Blanked out the reflection of my garden)
Settings -> Devices & connections -> Controllers & headsets -> (Select your controller) -> (Three dot menu) -> Update now.
(Blanked out the reflection of my garden)
All new (first party) controllers have firmware updates these days. Sony has almost identical prompts and used to require you to plug them in via USB to update before they eventually figured out how to do it through Bluetooth. Even PS4 controllers going back almost 11 years now used to prompt for firmware updates from time to time. And Switch controllers will update as well, but usually very subtly.