If the included Fire_FireResistance family is used, it has an Instance text parameter Fire_Info,
the GUID from the linked instance will appear on this parameter.
It is not necessary to have this parameter on the family,
but it will give a visual affirmation that the component has been/are connected to a linked instance.
Note: After summer release 2021-08-30 in Revit 2020 / 2021 the symbol will automatically rotate with the opening. It will follow how the door is places, it will cause more rotation using <space bar> but less with align tool. Known issue that it can rotate wrong with certain project norths.