Is there a way to hide settings or lock these settings?

Hello Community!

I have a question and that is for our sharepoint intranet site we have created a user and this is used for digital board monitor (touchscreen enabled) so that clients can view the site.

The problem is the customers can go to this gear and log out the user or go to these settings and change something. But we don't want that. Is there somehow a solution for this ?

Click on Gear - Settings
Websiteinhalte = Website content
Websiteberechtigungen = Website permissions
Websiteverwendung = Website Usage

Click on User
Abmelden = Log Out
Konto Anzeigen = View Account
Mein Office-Profile = My Office-Profile

Kind regards

Oguzhan Okur