This thread has rambled a bit, but the original question was about the profiles you'll find in the Profile menu in the Camera Calibration panel in LR's Develop module.
It's not hard to make your own camera calibration profiles (you might want different profiles for daylight, tungsten, etc) using Adobe's free
DNG Profile Editor and a 24-patch colour checker from X-Rite (formerly Gretag Macbeth).
You can add these to the Profile menu, and maybe to your Import Preset. I generally make my own custom Daylight Profile on the first dry, bright day after I buy a new digital camera, and have preferred these to embedded or Adobe Standard profiles in 99% of daylight (and great majority of other) shots. Bear in mind these profiles are intended to be used at import, and provide a starting point/ context for work in the Develop module: the camera profile should be set
before white balance, tonal or colour adjustments.
Lens Profiles are another thing entirely. They're for correcting lens-specific optical aberrations, and LR now has a good stock of Leica lens profiles. For Zeiss or CV lenses, and unlisted Leica lenses, I think we're likely to be on our own, with only something like Adobe's free
Lens Profile Creator to allow us to build profiles for our own lenses. It's free, but looks daunting, and so far nobody seems to have uploaded any profiles for RF lenses...
Maybe somebody here has tried it and can report on their experiences