What I mean is that: they either use the Israeli New Shekel or Jordanian Dinar to process and conduct transactions due to them not having an official currency of their own that deems it Palestinian. Why don’t they have their own, since they are using someone else’s currency for daily purchases or transactions.
You need functional infrastructure like a government, a bureaucracy, probably a bank too in order to print money. It’s hard to have those things if they live under the boot of Israel. Every possible Palestinian authority that could form is constantly undermined and threatened by Israel.