I can't smack my lips after rhinoplasty, is this normal?

Unless you had some direct manipulation of your lip surgically to either lengthen or shorten it, then this is most likely just swelling and will likely resolve in six to eight weeks.

Hello and thank you for your question. It is possible that the general swelling in the nose is making your lip feel stretched. If no surgery was done on the lip, this should settle in a week or so. If you have ongoing concerns, please arrange to see your surgeon.