Ubuntu 21.04 on Dell Latitude 9420

Dell's newest Latitude 9420 comes with a 16:10 display and a integrated Webcam shutter (see below).

Soundcard and Touchscreen:

Download and install Linux Headers, Modules and Images of Kernel 5.13 from https://kernel.ubuntu.com/~kernel-ppa/mainline/ 

Headphone jack works, speaker do not. Seems to be a general problem with Linux on Tiger Lake. 
Update 2021-11-01: I don't know what exactly did the trick, but with latest Ubuntu updates combined with mainline kernel 5.14.2 the speaker works!

Docking Station (Display Port) requires evdi-dkms and libevdi 1.9.1, but the version from repository is not compatible with kernel 5.13, you need these

Webcam (PCI ID 8086:9a19) 

Will not work until IPU4 is supported