The normal rule we apply is inevitability. The only way to access this point or any point within the next few hundred metres is via a motorway, so we call it motorway / motorway link. https://wiki.openstreetmap.org/wiki/Tag:highway=motorway%20link?uselang=en-GB#Link_roads_between_different_highways_types

This https://www.openstreetmap.org/way/871882808 should probably be marked as a motorway link.