Mikrotik Chateau 4G Passthrough and WiFi

Hello Team,

I am planning to buy Chateau LTE6 which will be configured as 4G passthrough in front of my Fortigate.
I was wondering if the Wifi on the Chateau can work properly ( DHCP etc) while in 4G passthrough mode.

Probably a seperate vlan for the SSID can do the treak ? or i will need a seperate AP connected to Fortigate?

Thanks and any info is much appreciated.