Windows 11 Insider Preview channels grayed out for months — Build 29648.1000 (rs_prerelease)

Hello Windows Insider team,

I'm using Windows 11 Home Insider Preview, build 29648.1000 (rs_prerelease), on my HP Laptop 15-fc0xxx with an AMD Ryzen 7 7730U and 16 GB RAM.

The Dev, Beta, and Release Preview channel options have been grayed out for months. I cannot select a channel or change my Insider settings.

I contacted Microsoft Support, and they directed me to the Microsoft Tech Community for further assistance.

Could someone help me identify why the channel options are disabled and explain the recommended steps to resolve this issue?

Thank you!