The question Virtual Reality and Physical Trauma is basically asking if there's any basis to the trope that wounds gained in VR appear in real life.
Is reality checking a known trope on topic?
I would say yes. A trope is just a common bit of worldbuilding, it's no less on-topic than another perhaps more original question. The one place tropes can get a bit off-topic is when they start to delve into specific story-based instances of the trope or where they are asking about a specific story based instance of the trope in a particular other world (that's already built).
I've asked a few questions with a basis in trope (Anything relating to the Starship Exciting Undertaking), but I've always done so tongue-in-cheek and with a firm emphasis on how these tropes could fit in with a world building process.
The VR question is on topic, though I personally would have preferred less of a vague reality check and more of a 'I've tried to make this a thing in my world but got stuck on the details' style of question, though that's just me.