When I got the RE200 and had the initial firmware before updating it to whatever was the latest that time, it had an option for "Host Network for Ethernet port". I dont remember if the option was...

@Persechini only router + repeater combination. The below pic shows how it works

@Kevin_Z what's the difference between Archer A6 and C6?

@Persechini you can't connect two routers together for OneMesh. One supported router and one or more compatible range extenders are needed to work with OneMesh. Here's the list of compatible range...

@dynamoAnik It will, the router is listed on the OneMesh page. Maybe a few weeks delay for EU model. https://www.tp-link.com/en/onemesh/compatibility/

@aomara your Hardware version is V3 which cannot be changed, each hardware version has their own set of firmware. Here is the firmware list for V3:...