Oh, and the screens both run at 60hz. 8bit RGB

Hey,
Yes, the device manages the 2x 4K screens flawlessly.
I have been using the device for work and private use since June 2022.
Connection options are:
3x USB rear standard
2x HDMI
2X display port
1x DC in with 20V
1x DC out with 19.5V
1x USB C front
1x Micro/headset jack connection

I use the device with a Huawei MateBook X Pro for private use and with a Lenovo ThinkPad T490s for business.
I have connected 2x HP E24q G4 monitors with a resolution of 2560x1440 pixels each.
The power supply of both laptops and the connection to the screens is ensured via the USB C cable, but can also be plugged into a standard USB port. The cable and DC connector were included in the delivery.
I hope this helps.