I believe you need to specifically use the Thunderbolt 4 cable. What is the $200 Pro cable? The other 240w usb c cable from Apple isn’t the same thing as the Thunderbolt cable.As mentioned in my post, I used the 200$ Apple Pro Cable which is USB 3.2 certified. I tested other cables as well.
From the post you quoted: "… and yes, I tested it with multiple cables, all USB 3.2 certified, even the original Apple Pro cable."
I updated the post and now and highlighted it with some color.
Thunderbolt 4 (USB‑C) Pro Cable (1 m)