I did this, but couldn't see Unifi devices in the network controller.
Well your only going to see unifi devices when they are in the same L2 network, unless you did L3 adoption..
I even brought up putting wireless and wired in the same vlan, etc. Which is why you would want a switch.. Bridging interfaces is NOT a switch..
As I suggested from the get go - get a switch to put in front of pfsense so you can do whatever you want with putting anything you want in any specific vlan.. If your going to connect a AP that has multiple vlans on it directly into a port on pfsense, you would have no way to add wired devices to any of these vlans.. Without the nonsense that is bridging..
Spend the $40 and get a vlan capable switch to connect all your different devices together.. Then either use multiple uplinks or setup lacp into pfsense so it can route between the networks at L3..
Or get an appliance that has actual switch ports on it, like a 2100 or 3100