Question about TP-Link Archer AX73 Wi-Fi 6 Dual-Band Router AX5400

Yes

Yes.of course.there are two openings for hanging in the wall.works very well for me.

Yes, it has two recesses for hanging the Archer on the wall (insertion of the screws on the unit).

Yes

Yes, it can be screwed to the wall and the aerials positioned vertically.