Keyboard backlighting not working
I've been unable to use the backlight on my 2019 mac book pro for a few months now and can't find any solutions. I have never damaged or spilled anything on my laptop so I don't know why it would be broken. I can access various ways to adjust the light level on both my touch bar on the bar at the top of my desktop, but both do nothing. When I try to move the adjustment bar on my desktop, it just jumps back to being turned off.
What's weirder is that when I reset my laptop, the keyboard backlight turns on when my laptop is restarting. However, as soon as the restart is complete, it shuts off again.
I've looked at a lot of forums online and they say to use system preferences to change options surrounding automatic adjustment of light levels, but I don't even have that as an option in my system preferences. I'm totally lost.
Thank you in advance!
MacBook Pro 13″, macOS 11.6