Need advice on diagnosis

Since it took a month to determine that there is no fuel pressure the best thing to do would be to let the shop perform the repair.

End result was wrong pump for the vehicle. AutoZone said it was right part but it would only read half a tank aswell as not sending enough voltage. Pump read 2.0 was told needs atleast 2.4 Once it’s under half the pump will read empty and not power. Returning it and getting one from Nissan. Cars up and running at the moment.