Login issue

Any guidens:

I have a log-in issue with my router using my iPhone. It is a new issue.

1-  Failed cell login despite PW is correct. I can login to the router using my laptop.

2-  If I select "Connect Via Anywhere Access, on the cell apps the router shows DEVICE OFFLINE on my Cell phone

I have done the following:

A- I have rebooted/reset the router many times.

B- Reflash the Firmware

Router info:

Netgear Nighthawk X6S

AC3600 Tri-Band WiFi Router

Hardware Version            R7960P

Firmware Version            V1.4.1.68_1.3.28

GUI Language Version    V1.4.1.66_2.1.46.1

Cell info:

Phone: Apple 12 Pro

Phone SW Ver: IOS 14.7