Shelly Wall Display- How to password Protect ?

Hi all,

New to this community and Shelly.

I want to use a wall display as Thermostat in our B&B.

1. can it be locked/password protected while our guests still can use the thermstat to control the temperature?
2. can it have a minimum and maximum setting? like only selectable between 18 and 24 degrees?

Thank you in advance

Michiel