No, you cannot leave feedback if you haven't made a purchase.
You'll have to find another seller as this one is not accepting any bids or offers from you, a seller is allowed to block a buyer and does not have to have a reason for this, but the incorrect address offered the first time could be the reason, no one wishes their item to be sent only for it to perhaps be returned.
There are over 50,000 Barbie dolls listed, I'm sure you'll find the exact one you are after, from another seller.
@alexandr-3624