@dvdmav
Hey
You can indeed copy the same configuration from your homeplugs and apply it to your EAP225, all you will need to set is the SSID Password and Security Type (WPA2 most likely). You will need to manually copy / setup the EAP225 as there is no way to automatically move the config from the homeplugs to it
so it can be seamless when moving in and out of the house
In networking terms seamless means it will automatically hand over from A to B without disconnecting the device, NO is the answer in your case. However if you mean will it reconnect again automatically when you are outside the house? likely but this wont be clean / seamless
When you move out of range of the Powerline, it will disconnect and reconnect to the EAP225, but this wont be seamless. If you are on a teams meeting or zoom your connection will drop for the time it takes to reconnect from one to the other. Client devices are bad at this and tend to hold onto the current AP (powerline) until its signal is dead, only then will it look for a replacement (dropping your connection while it does this). Once it lost connection to A totally it will start looking for any SSID it has a password for, it will see B advertising and start connecting to that, the process will take around 5-10 seconds at a guess
To have "seamless" roaming you require 2x or more EAP225 and a controller to handle the handover, something like the OC200 which can tell the device to move to B without dropping and re-scanning, overall the move takes a few milliseconds. The powerline adaptors dont support seamless roaming, this is only a option on the Omada Business grade hardware.
Hope that helps