@George878 Keep in mind that in Multi-SSID Mode a different VLANs are supported by the AP and if your router doesn't support VLANs you may end up using only the SSID with a VLAN 1.

@OPachequinhO Follow this guide and check if these suggestions make any diffenrce in your RE bandwidth.

@lolaj To reset the RE hold the reset button for about 10 seconds or until the lights change. When setting its administrative paswsord try to use only alphanumeric characters to exclude any special...

@George878 When using it in AP mode, it's best to use a static IP address and DHCP set to off. Reboot the AP and give it some time to show the connected clients.

@TomD2 The first link that leads to a blog is pretty much alive and I can open it without any issues - https://www.tp-link.com/en/blog/50/wi-fi-range-extender-why-choose-them-and-how-to-install-them/...

@g_speran EAP225 is part of Omada solution and it's not mesh compatible with Xfinity ARRIS TG4482A. So your best bet is to use the same SSID for both devices and leave your wireless devices to decide...