Hello Bahaa,
If you decide to remain in the Dev branch, MS will change the expiration date as long as you keep updating. You are currently testing 26H2 which will become release by this fall.
If you want to return to the Release version of W11, delete the entire WindowsSelfHost Key. It will be rebuilt after a reboot:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsSelfHost
After you reboot, check to see if you are out of Insider on the Insider page. You need to dl the ISO image from here and mount the image within Windows and run setup.exe. This is a repair install and you will retain your files.
https://www.microsoft.com/en-us/software-download/windows11
Regards,