Apologies if this is old news; I’ve searched here and elsewhere and found no reference to it. I sent my Powertap P1 pedals off for a warranty repair as they were misbehaving in various ways, including not being able to connect to the Powertap app on my iPhone.
Just got a call about them from the UK service centre and the technician told me that the place to get new firmware and perform other setup and day-to-day tasks is now the SRAM AXS app. My firmware was 3 revisions out of date and the Powertap app had no clue that this was the case. He did advise me to keep the Powertap app installed because it has one feature that hasn’t been reimplemented in AXS, but otherwise all development is now on AXS.
Please note that I haven’t been able to verify this as the pedals still need some mechanical repairs and have not yet been returned. The SRAM AXS app page says that it’s the hip new place to be for PowerTap P1 and P2 Pedals: https://www.quarq.com/product/axs-app/