For that the user role tokens have been created, which you can use in the xpath where retrieving from entity userrole:
This is for every project role. So if you link the project role to your specific module role, it would get you what you need.
You can use the module roles for page- entity-acces etc. within the module.
In your microflows as Tim also indicates you can only work with the project roles.
But you can also use module-roles for conditional visibility in your pages, so if you make the button invisible for all module-roles except the administrator module role, that should do the trick. See picture below and use “selected roles” in that case.
But you might also find out you have to rethink your module-role to project-role mapping….