@pimpin 

I do not think the AX55 supports what to want.

What you want is a router with WISP mode. Some repeater and extenders may have the WISP fuctionality.

  @ArcherC8 thank you ! Can you provide some references that provide wisp mode ?

  @pimpin 

One example would be TL-WR902AC.

It may not fit your needs as your requirements may need more Ethernet ports, different WIFI, WIFI speed, not available due to where you are located, and such.

Look at router specs for travel routers as most would work. I am sure there are some full featured routers that have WISP, Router, AP, Repeater, and other modes but none come to mind.