Red channel clipping problem also depends of color managed or non color managed workflow used. As you may know non-color managed timeline adds some sort of build in additional factory color correction to DNG source.
Here some tests with DNG Pocket4K sample from other thread:
Pocket4K non color managed. Crazy saturation clipping artifacts:
![Image](https://i.imgur.com/DO0QLja.jpg)
Now switch to YRGB color managed (less saturation clipping artifacts):
![Image](https://i.imgur.com/xpyjj2M.jpg)
And this is with Timeline set to wider color gamut and flatter log gamma curve. Way less saturation clipping:
![Image](https://i.imgur.com/NVk61fu.jpg)
UPDATE: RED IPP2 (contrast - High, Highlights - very soft):
![Image](https://i.imgur.com/gkUtCfT.jpg)
All tests (except RED IPP2) done with one single color space transform node added to the timeline.
Another option is to use RED IPP2 color mapping in project settings. It have 3 different knee+contrast options. It produce even smoother compression than original Color Space Transform tool. But it is not available as a Node tool yet. You can apply it only project settings. By the way RED IPP2 compression in Resolve project settings is math formula based so it works with ANY timeline color space and gamma curve.
There are also RED IPP2 LUTs for timeline node. They do the same thing.
https://www.red.com/downloads/options?itemInternalId=16126&version=4YRGB non color managed (all gamma controls reset to 0):
![Image](https://i.imgur.com/K4fyYks.jpg)
CST with Saturation Mappng:
![Image](https://i.imgur.com/lQ8bvyc.jpg)
RED IPP2 (contrast - High, Highlights - very soft):
![Image](https://i.imgur.com/utkEfFN.jpg)
Even those extreme 3200ISO samples with red lamp became usable with RED IPP2.
CST with Saturation Mappng:
![Image](https://i.imgur.com/tpNY4xg.jpg)
RED IPP2 (contrast - High, Highlights - very soft):
![Image](https://i.imgur.com/1KCBPlU.jpg)
And if lower expose we can see that all recovered highlights are there:
![Image](https://i.imgur.com/d0LJ53B.jpg)