HDC403-P23-USBK-N and Ubuntu laptop

I'm looking for a KVM that will be able to handle my 3 monitors with Windows PC, Linux PC , Windows laptop (USB) and Linux laptop (USB).

For all devices I would like to use extended desktop.

Documentation says it is not possible:

"Up to now, devices running Apple’s MacOS, Ubuntu and other operating systems do not support MST mode."

However, MST is present in Ubuntu for quite a while.

Are you planning to update this KVM to support Linux?