I also don't understand why test in ch 2.3.2.3 asks for "unmodulated" signal, because for RF power test this shouldn't matter. And maybe it is even better to use modulated signal because it is more closed to reality use cases.
In fact in BLE RF test spec, RF-PHY/TRM/BV-01-C [Output power], it suggests to use PRBS9 payloads.
And if you look at this document Annex C, page 101, it says " [1], [5] or [6], then[q] or [w] ".
I think the AN12798 document owner should double check on this.