Thus far, as Gateway Station has continued to evolve, I've come to the conclusion that the Anker 555 hub needs to die. I posted an earlier entry on it's troubles with Rimuru, and the process of elimination from the NT side of my setup.
Now that Shion the MacBook Air is at the center point, and Stark is officially retired to /dev/closet, the issues of course continue.
What I'm finding is that the hub works great with macOS when connected to Apple's Thunderbolt 3 / USB 4.0 controller. Except when you use the Power Delivery port, in which case it doesn't do jack shit. But otherwise seems to function provided I leave the USB-PD port clear and power Shion directly.
Now part of this may owe to the fact that I'm now using one of Anker's new GaNPrime chargers to drive everything. A downside of Anker's new fancy chargers is they expect intelligent negotiation of power that sometimes causes issues, Anker chargers being heavily marked for compatibility, aside the point ^_^. To eliminate the possibility that my nearest Apple C-to-C cable might not be rated for enough power draw to charge a laptop rather than an iPad, I also opted to try the same configuration using one of Anker's 100W rated PD cables with the exact same result.
Thus, I am reminded that the hub cost about as much as retrofitting Rimuru from my USB 3.2 Gen 2 10 Gbit/s card to a Titan Ridge based Thunderbolt 4 card, which also has a pair of USB-C connections. For now, I think a Thunderbolt dock will be replacing the Anker hub. The question will be whether or not my one cable swap approach remains, using the dock in place of the hub, or move everything through the dock and dare to suffer whatever the state of Thunderbolt drivers are for Windows 11....