Both AX1800 Router and AC2100 Router have two setup methods, with the app and with a web browser. You can click the link below to check the detailed configuration steps.
Set up AX1800 Dual Band Wi-Fi 6 Router
Please visit How to configure my rockspace AX1800 Dual Band Wi-Fi 6 Router.
Set up AC2100 Smart Wi-Fi Router
Please visit How to configure my rockspace AC2100 Smart Wi-Fi Router.