keyboard brightness not working
So, I got a MacBook air for school it's the 2020 version, it has the fingerprint option and on the back, it has A2179, if that matters but I got it not even a year ago, out of nowhere the keyboard brightness thing just stopped working. I called apple and the operator said that it might be a bug and to wait for the update. Ok, it's been like 3 updates and it still not working, also keyboard brightness doesn't even show in my settings at all. It's like it's not even on my laptop. So I don't know what to do. It's on my menu bar but someone, please help lol thank you. :)
MacBook Air 13″, macOS 11.3