As of now there is no OOTB functionality to achieve your requirement.
We can write a logic to fulfill the requirement.
1. Write an activity to check AccessRoles which is called before the Screen flow start. In the first Step loop For each element in value list "AccessGroup.pyUserRoles". Add when condition for the step as per requirement. Set a property if required access is available for the operator based on when evaluation.(If ABC role is only available, set property value as Read-Only)
2.Circumstance the section when value of that property is "Read-only" to show the values read-only