Magic Keyboard Function Keys

Same issue here. So we can't buy the old version of magic keyboard and the new one does not support function keys for our mac on latest available update (Catalina 10.15.7)? This is exactly the opposite of why I decided to buy Mac. I hope we will get software fix because it cannot be rocket science.

To be sure, you should find the function key option in System Preferences > Keyboard under the Keyboard tab, though I'm not certain the option is there with the external wireless keyboard – I don't have mine at hand at the moment.

If rebooting your Mac doesn’t fix things, see if the problem still happens in Safe mode (hold the shift key down at startup). It can take much longer to safe boot (10 min) so be patient.

How to use safe mode on your Mac - Apple Support 

Safe mode forces the OS to clear certain caches and logs and do other miscellaneous housekeeping. It's non-destructive to user data so is safe to do. Very often certain weird software behavior is corrected by simply logging in this way as a troubleshooting method. When you're in safe boot, the machine will not be at its best performance, especially with graphics, but that's expected.

Does the problem persist while in Safe mode?

Exit safe mode by restarting your Mac normally and re-evaluate the issue again.

If the problem is still unresolved, please return here and post a reply and we’ll see what else we can come up with for help.

In that case, try resetting NVRAM.

Reset NVRAM or PRAM on your Mac - Apple Support

You can also try resetting the SMC.

How to reset the SMC of your Mac - Apple Support

I had the same problem. Need to install macOS 11.3 or later.

https://www.apple.com/shop/product/MK2A3LL/A/magic-keyboard-us-english

Did you buy an Apple keyboard? Not all third-party keyboards will show "Use F1, F2, etc. keys…"

You're welcome. Other than reinstalling macOS, I'm out of ideas.

Same issue. Any luck contacting Apple for a fix?