Hi there ahmedysf,
If you are getting unexpected pop ups on your iPhone, you may have unintentionally installed a profile or some kind of device management that is causing this to occur. This information from Install or remove configuration profiles on iPhone shows how to remove these profiles:
You can see the profiles you have installed in Settings
> General > VPN & Device Management. If you delete a profile, all of the settings, apps, and data associated with the profile are also deleted.
Ensure your iPhone is fully updated as well as this installs security updates and bug fixes that can resolve issues like this. This shows how to back up and update: Update your iPhone or iPad
Cheers!