@JeromeFJ, thank you for the detailed write-up and lovely feedback.
I went through my dashcam footage a few times to know what went wrong that resulted in yesterday's refusal. As you could see from the footage https://youtu.be/ojFltMW37-g , there were few cross tracks and the sand was already churned up. After seeing the LC ahead of me, I was bit hesitant and slowed down at the wrong moment. By letting the Raptor free and use it's full power (which I eventually did 🙂), either I should have gone up a bit more or got down sooner. It was good experience and to learn from it. So thank you once again for helping me with the self recovery.
The other issue that I had shifting back from 4Low to 4High, seems it's a known issue with Gen 1 Raptors and F150s. There are so many references on many forums, one of them https://www.fordraptorforum.com/threads/4-low-to-4-high-sticks-in-neutral-then-grinds.60595/. I am getting it checked and fixed if needed as soon as possible.
@Gaurav, thank you for your guidance and amazing drive yesterday. All the leads in action