Good, that confirms what I suspected. I believe though marketed as backward compatible, usb 4 really isn’t truly backward compatible, unless the usb 3 device has a usb C connector, AND the cable is not switching from any connector that is not usb c, AND that the cable is true usb 3 compatible.
I’ve had weird usb connector issues, and have found connectors that claim to do something often do not work at all, for example, a usb A female to usb A female adapter to male A to male usb c cable totally failed, and I got no connection at all. But a usb female A to usb c male worked fine.
Also note that newegg did not list any usb 4 flash drives, making this very new. Did have some usb 4 enclosures though.
Judging from your case, which is just one instance so not enough to draw conclusions from firmly, it appears that it’s possible that usb devices that do not use connector C natively on both ends if a cable, and on one end if not, will not work as usb 3 or 4 devices when inserted into a true usb c connector usb 4 connector,
This still does not explain why no usb 4 hub at all appears in your data, that may be either driver/firmware/hardware issue, or, more likely to me, that usb 4 hubs do not activate until there is a reason for them to be there. Nor does it explain why the pixel which would be usb C to C connector cable failed to show as usb 3. Unless you without realizing it used a usb 2 C to C cable. I have yet to discover or determine if there is a non usb 3 c to c cable, or if c to c by definition supports usb 3 and 4.
This will require more user data however over the coming year, and more than one single case to determine.
But this is a good start, appreciate it.