Compatible USB hubs for AOC AG493UCX2

Hello, I have the AOC AG493UCX2, and I would love to use its KVM ability with my two laptops, a Dell laptop, connected via USB-C and a MacBook Pro Max M3 connected via a CalDigit 4, Display Port connection with USB-A/B between the CalDigit and Monitor US/DS connectivity.

I have a keyboard, mouse, webcam and headset. Unfortunately that’s 4 USB connections but only 3 native ports on the monitor.
I would like a USB hub that can allow say mouse and keyboard into one USB connection on the monitor.

I can’t get my Mac to recognise any of the peripherals attached to the Mac. I have tried a U-green hub to no avail.

Any thoughts would be appreciated, especially if you have a similar setup as mine.