Ah, okay... This one is not available yet. It's hardware equivalent to UCG-Fiber. Wait for matching MikroTik access point if you like MikroTik gateway better. It will be easier to manage compared to mix and match.
I've recently created a setup using an Asus RT-BE86U as an AP with multiple VLANs for my varied SSIDs and I use OpnSense as the DHCP server and use a managed switch. I did have to create a script running on the Asus to get the VLANs for the different SSIDs to work properly especially after reboot which I use with the Merlin FW. I have a VLAN that is for a whole load of my IoT devices but I dont use AI Mesh at all
The RT-AX88U Pro in @heysoundude signature can be used as AP with VLANs as well. I personally don't like mix-and-match, but for cost saving measures and reusing existing equipment it's doable.