guest network access with facebook login
Not sure what the question is?
this function does not exist
Why should it exist?
One would expect you to write more than just a half-sentence.
I think he means some sort of captive portal which requires fb login.
Though i believe reading the 2023 feature notes this will not be added.
Though there are some OpenWrt alternatives you need to use OpenNDS and write your own scripts and logic to accomplish the same, but theres not a standard solution 