@Vincent-TP Thank you for the very detailed reply. I will take this into consideration using the Bridge+switch instead of AP+router. As for clarification, by EAP225 it think i was referring to the...

This is my current Topology: 1) Fiber ISP Modem/Router LAN1 > 4G/5G Wifi Modem (For Cellular Back up) WAN, then LAN1 > TP Link AX23 > Home1 Network and IoT (Wired and Wireless). This works very Fine...