(The drop-down Model field for creating this thread does not show my model as an option, so I selected something else just so I can post this)

Trying to configure it to support compatible mesh devices, but there is no "Advanced" option available to get to the EasyMesh configuration. Where various references show the "Advanced" option to the right of "Wireless", mine shows "System". There is no "Advanced" option under System either.

(Hardware Version: Archer AC1900 1.6)

(Firmware Version: 1.13.15 Build 240812 Rel.53972n(5553)