Question KVM for 2 laptops, with docking station ability for new setup ?

[nostob]

I used several KVM's in the past with traditional audio,USB, video switching. I am looking for some guidance on what KVM to pick for new setup and whether KVM's are still needed or more like a USB switch. I also would like to reduce the number of devices. Therefore, eliminate the docking stations if possible and use the device to power/charge the laptops

What I have:
1.) Input
Two laptops. Microsoft Surface Pro and a HP EliteBook 845
2.) Devices:
Monitor: Dell U3023E ( I think it has several options for video input and could also act as a hub for devices
USB-A mouse and keyboard
Speaker TBD (can be USB)
USB camera

Are there KVM's with dock capability?
Or some sort of USB switch with power/charge capability?

 

[nostob]

Here is what I found so far. But still not 100% sure.

Sabrent 4 KVM switch:
https://sabrent.com/products/sb-tb4k?_pos=4&_sid=5167736de&_ss=r
(they have some others, but only with HDMI)

This AVAccess seems to work, expect HDMI 4k only, not 2560 x 1600

Are such devices really that rare, or do I approach this the wrong way?