Nope. Not even historically was that the so-called land of “Palestine” (Philistine land). And not even people like Zuheir Mohsen of the PLO would claim Jordan to be “Palestine”, even saying that his intent was to “unite Palestine and Jordan”, referring to them as separate entities, once his dream of making the Levant “Judenrein” came to be that is—so that meant “Palestine” and Jordan would be united under the Arab Nationalist Caliphate.