In Civ6 many elements can be unlocked through both technologies or civics.
There's 3 ways I see to go about this:
Option 1: Have a field named "Technology/Civic required"
Option 2: Have a field named "Advance required". Advance should be a clear enough word to represent both concepts
Option 3: Have 2 separate fields. Unused fields are hidden so you'll only ever see one of them at a time.
Upon further reflection I think I'd rather go with Option 3. Its the cleanest.