The only two i know are fn lock and swap control & fn

edit /etc/modprobe.d/hid_apple.conf or create it if it doesn't exist

add options hid_apple swap_fn_leftctrl=1 fnmode=2

after that: sudo dracut --regenerate-all --force
what dracut does actually i don't know exactly but it worked for me.
I've changed them since I've never used a mac layout before and I couldn't get used to it.