@mrkefca 

Hi, welcome to the community.

The expected connection would be:

RE1---Archer AX55----RE2

Since Onemesh exists between Onemesh router and OneMesh extenders, if you want to create a topology like Archer AX55----RE1----RE2, you might need to set up RE305s as normal range extenders, instead of OneMesh extenders.

Or if you tend to update the whole network system later, you could consider our Deco Mesh system, like:

https://www.tp-link.com/en/home-networking/deco/

Thank you very much.

Best regards.