I have read of maybe one person trying to install an ASUS networking product outdoors, and sounded like made the necessary steps to shield it from elements such as rain. I also remember reading that the unit, either router or extender, did not last very long. I assume outdoor heat/moisture may have lead to early failure.
There's a thread on the ROG router networking forum asking for future gaming router suggestions. It may be a good place to suggest it:
https://rog-forum.asus.com/t5/gaming-routers/make-future-router-feature-suggestions-here/td-p/902816
