Hello,
Could you open Command prompt on your laptop (or some other command line interpreter, if it is not a Windows machine) and try pinging 192.168.1.1. Are you receiving any reply?
If not, could you enter ipconfig command, to check IP address assigned to your laptop's ethernet interface and default gateway. This will either show that no DHCP is given by the router, or will list the subnet and address the router can be reached by.
In case your laptop has no address leased, simply reset the device to factory default settings by holding the reset button for 12 - 20 seconds on the front facing device plate.
To configure wireless encryption to WPA3, once logged in to router's WebUI, navigate to Network -> Wireless. Open either 2.4 or 5GHz interface settings, switch to Wireless security tab and set Encryption option to WPA3-SAE.
Best regards,