first,make sure you logged as administrator role.

Authenticated user role:

Changing by you click and edit on Authenticated user role and uncheck on Capability as below:

• Manage Dashboard page blocks :
  when you are unchecked Capability:moodle/my:manageblocks , it means you don’t allow user or student edit mode button on Dashboard page.
  

  

• Manage blocks on own public user profile :
  when you are unchecked on the box  Capability:moodle/user:manageownblocks , it means you doesn’t allow user or student edit mode button on Profile page.
  

  

• Edit own user profile :
  when you are unchecked on the box Capability:moodle/user:editownprofile, it means you don’t allow user or student to edit your own profile, close edit profile which there are last name, first name, username, email, user picture profile, city and country.
  

  

Conclusion

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