Before I send it back

So I didn't pay close enough attention when ordering a new router. I was aiming to order an ASUS RT-AX54, so I ordered an ASUS RT-AX5400 (which is also called the ASUS AX-82U).

Before I go through the hassle of sending that back and ordering an ASUS RT-AX1800S instead, I wanted to check whether the firmware would work on the device that I did order. It's not listed on the "Marketing Names" section of the device page, but that page also indicates that it's under construction.

Any help greatly appreciated.

TL;DR: not supported


But that's what I was afraid of. Thanks for the quick solution.
I'll plan to get this instead: