Wikidata entities used in file description wikitext are currently recorded in entity usage table. Similar wikidata entities used in SDC statements are not recorded. For example File:Seneca_Rocks_climbing_-_13.jpg infopage in "Wikidata entities used in this page" section has a link to Seneca Rocks (Q7450337) because infobox template pulls the label from that entity, but links to other depicted entities like Traditional climbing (Q2214812) is missing when similar label is pulled by SDC tab.
This observation was made by @Lucas_Werkmeister_WMDE in T237899. Ant thiss might be a blocking issue for that ticket.