Hi Christine,
Sorry for the trouble caused at your end.
From the description provided, we would like to know whether the two missing site columns that are added to Site Content types are not displayed as columns in Document library (like Name, Modified, Modified By etc.) or missing columns are not shown in the
properties of documents created using that Site Content type (Select the document created using that Site Content type> Open the details pane> Under Properties)?
If you’re referring to not displayed as columns in Document library, we suggest you Edit the current view and check whether the missing site columns is checked under the Column Name or not:
Open the problematic Document library> Click on Switch view options> Edit current view> Check under the Column Name, enable the columns if they are not enabled> OK
If missing site columns are not shown in the properties, we would like to follow the steps and check whether Hidden option is selected:
Open the problematic Document library> Settings> Library settings> Scroll to Content Types> Click on the Content Type where the two missing site columns are added> Click on the missing site column> At the Columns Settings, check whether the option Hidden
is selected. If yes, please change to Optional or Required as per your requirement> OK
If we misunderstand your scenario, we’re sorry and can you please guide us in correct path by providing some more detail description?
Appreciate your understanding.
Best Regards,
Chitrahaas