There no arabic on localectl list-x11-keymap-layouts

I downloaded i3wm on my manjaro I tried to put a shortcut to change the Arabic layout
I used to put this on the i3 config file

xec_always "setxkbmap -model pc104 -layout us,ar -variant ,, -option 
grp:alt_shift_toggle"

but it’s not working then I tried

exec "setxkbmap -layout en,ar"
exec "setxkbmap -option 'grp:alt_shift_toggle'"

but still not working I ran localectl list-x11-keymap-layouts and there is no Arabic so how do I add Arabic to it

(Sorry for my bad English)