I'm running Windows 11 on a new XPS 13 (9300) with a WD19TB docking station and having the same problem. Removing and reinserting the USB cord wakes the screen and other peripherals.  Update=Issue is resolved after changing the settings in BIOS.
Hello, I am experiencing an issue where when I try to wake my computer by pressing a key or moving the mouse, the external display often does not come back on. Trying to turn it off and on again does not work. Often the only solution is to reboot it or try to unplug and replug the dock several times. Relevant Hardware: Dell XPS 13 9300 - BIOS v1.1.0 Dell WD19TB Dock - RTS5487 has v01.47 and RTS5413 has v01.21 External Monitor: LG 32UD99-W 4K - Connected via WD19TB using Displayport cable Relevant Software: Linux kernel version: 5.7.16 Display Driver: i915 Potentially related error messages: xhci_hcd 0000:2e:00.0: xHCI host controller not responding, assume dead pcieport 0000:2d:04.0: can't change power state from D3cold to D0 (config space inaccessible)  
XPS 13 9300 with WD19TB - External display not coming on after sleep