nostr:npub1kg2wxff853ztqrt3tktytcs34c7keg8rs45rev95g4axcweryhksu7ckz0 No.

You can see who boosted your post. But you don't know whether they saw your original or whether they saw it boosted by someone else.

You can make an educated guess by looking at timestamps, but it is all a bit fuzzy (by design).