P: Support for Canon .CR3 Camera-matching Profiles

Andrew I did exactly that with my Insta360 OneR which takes both JPGs and DNGs. I used the JPGs as a guideline to tweak the calibration pane. The results are acceptable...   

I can do the same thing with my M6mkII. Shoot in dual mode and try to build a profile... 
I bought a 3rd party profile for the M6mkII and the results are more to my liking than the Adobe ones

Here's all that I need to look for in terms of why you might be waiting for awhile, it's an official statement, here in the forums, from Adobe, not some undefined tech support person:

"Note: Not all cameras will ever receive a set of Camera Matching profiles.”

If they are produced and shipped, you'll get them, but don't expect, demand they will. But maybe they will. Until then.... There are other options until then, if then ever comes:

1. Create and edit your own profiles using the free software that is available.
2. Shoot JPEGs. They you'll get the exact proprietary rendering from the machine called a camera. 
3. Make edits in the Calibration pane and elsewhere, name a preset "1Dx Vivid" or whatever you want. 

That's the help I can provide at this time. If you need specific help in any of the above, I'd be happy to try. 

Sure. Even though they were US based you're probably right. Why don't you look in to it for us since you seem to be an expert on Adobe and their inner workings? I'm sure we would all appreciate the help.

Several people that I spoke with at Adobe support.

Ah, so Adobe support, not anyone on the actual ACR or LR team. Perhaps someone in a far off cubical in another country from where either team actually produces the product perhaps? 

Several people that I spoke with at Adobe support.

Which Adobe personal made such a promise?

Also still strange since they've supported every other 1Dx body up until now and I was told directly by Adobe personel that there WOULD be support for it... possibly within 90 days... in February... and they still maintain that stance.

1DX Mk3 shares the same Adobe support as the R5 and R6. No camera matching profiles for any of the new Canon cameras

I suppose what Adobe has posted for a long time needs repeating again:

” Support for a particular flavor of a camera’s raw file does not necessarily mean that there will be Camera Matching profiles for that camera at the time of raw file support. It is normal for Camera Matching profiles to follow raw support by one or two releases. In the case of some camera manufacturers or the event of major changes by a particular manufacturer, that time may be greatly increased.

Note: Not all cameras will ever receive a set of Camera Matching profiles. ”

The last sentence is key to read and accept.

Lol it boggles the mind that there's support for the R5 and R6 but not the 1Dx MkIII... the flagship pro body... i was excited for the update this week until I saw it didnt add any camera profiles for that... yet again...