[aspenmayer]

Maybe one or two of these will do what you want?

https://support.apple.com/en-us/105121

> With Screen Time, you can turn on Content & Privacy Restrictions to manage content, apps, and settings on your child's device. You can also restrict explicit content, purchases and downloads, and changes to privacy settings.

https://support.apple.com/en-us/111795

> Guided Access limits your device to a single app and lets you control which features are available.

[duskwuff]

Or "single-app mode", which is a more tightly focused kiosk mode:

https://support.apple.com/guide/apple-configurator-mac/start...