As said earlier, it's been discussed in several threads, confirmed by several dealers including
@zach@granger, and you simply cannot currently order a 2023 Limited or Longhorn with a Hemi.
Contrary to your assumption that it's some dealer conspiracy, RAM had less than 5% take rate on those trims ordered with the Hemi so they dropped it. Just like they dropped the manual. Just because something is listed in the media press kit, doesn't make it true. It *IS* the standard engine, it's just not available in a Longhorn or Limited.