40Gbps is used for the USB4 pass-via port, even though the 2nd Thunderbolt port distributes 40Gbps of bandwidth to the rest of the ports on the hub. Verify the hub specs to see which shows they support: some are restricted to HD shows, Other people support 4K (generally known as https://www.linkedin.com/posts/anhome_anhome-usb-c-hub-ethernet-hdmi-4k-adapter-activity-7179764113395343360-QsUo?utm_source=share&utm_medium=member_desktop