Yes. I can confirm. I hooked up an OWC Thunderbolt 5 Hub, and I get 40Gbs. To that I hooked up these components:
- OWC Thunderbolt 4 10G Ethernet Adapter (enums as PCIe)
- ACASIS 80Gbps M.2 NVMe SSD Enclosure which also shows the SSD as native NVMe. This is great because you can run all the native tools unlike plain USB enclosures.
- SMSL PO100 XU316 A/D Tosllink for audio to my amp.
To the other port I have a Cable Matters Dual 4K 60Hz USB C KVM Switch (apparently obsolete now, had it sitting around) so I can share with my work laptop. The only glitch I see is the Lenovo laptop pops a warning in Windows saying something about the monitor may not be running at full capability, but everything seems right…. 4K 60Hz. KVM Windows issue with laptop, no issue in Linux/Windows on the Desktop. The main point on the KVM is I get 4K video through it from desktop USB 4.0 port with no problems.