Make sure you have a DHCP reservation for your wireless ap’s ipv4 address and set the gateway on your AP to your pfsense IP address, and make sure the DHCP server and firewall on your AP is disabled.
You also need to enable the STP protocol so you don’t create a network loop with your wireless AP if it’s being used as a repeater
Btw this is easier to do with openWRT if you have the option