Block users from accessing the Settings app on Windows 11

[Windows Central]

Yes, you can prevent users from changing settings by blocking the Settings app and Control Panel, and here's how on Windows 11.
On Windows 11, Settings is the application that allows users to personalize the experience and customize system settings (such as account, network, privacy, and language). Control Panel is similar to the Settings app, but it's the classic experience that will continue to be available until all the legacy settings are ported to the Settings app.

Full story from the WindowsCentral blog...