When I try to change my password and logout from iCloud and other websites using my login,it refers me system preferences or system settings on a Mac iOS which am not aware of
iPhone 7, iOS 14
When you open system preferences > click on Apple ID > again click on password and security section , click on change password , it promise to enter admin password , once entered again a pop up window appears to enter new Apple ID password and verify it .
See the article Change Password & Security settings for your Apple ID on Mac - Apple Support
There is no option to simultaneously sign out apple id from Mac system preferences while you are changing Apple ID password , to sign out Apple ID from Mac system preferences , click on overview section , click on sign out Change Overview preferences for your Apple ID on Mac - Apple Support
When you open system preferences > click on Apple ID > again click on password and security section , click on change password , it promise to enter admin password , once entered again a pop up window appears to enter new Apple ID password and verify it .
See the article Change Password & Security settings for your Apple ID on Mac - Apple Support
There is no option to simultaneously sign out apple id from Mac system preferences while you are changing Apple ID password , to sign out Apple ID from Mac system preferences , click on overview section , click on sign out Change Overview preferences for your Apple ID on Mac - Apple Support
How do I remove my iCloud account from system preferences or system settings when changing my password
