Have a AX-55 as a router, after installing 2 extra AX55 first ( a year ago ) I had no Mesh ability I had to wait for the Beta firmware which would support this Now i have an AX55 with new firmware and

Can 1 put a second or 3rd AX55 in my WIRED network, put it in bridge mode ( as now my different AP's from different brands ) and than turn on Onemesh ? Or is Onemesh always wireless in the backbone ?