At the time of my thoughts/posts related to Lenovo ThinkVision M14 (latest generation M14t Gen 2 looks to be very sweet product: https://youtu.be/gDNWE3r5ViQ) I didn’t realize that there is implemented existence of power (up to 65W PD while consumes only up to 7.5W on its own) pass-through via its two USB3.1 Type-C DP1.2 Alternate Mode ports. Anyway I’m quite sure now that I’ve finally understood above “put together” setup and at the same time important contribution. At that time I was only familiar that Asus approaches/implementations (in general, just for some kind of comparison, more or less correlated to my earlier, above posted thoughts) to DisplayPort over USB-C differ (here is linked professionally made review of the one of their 4K-IPS USB-C DP1.4, capable to precisely deliver 8-Bit color depth to its surface, portable monitor) within their up to 17.9 inch ZenScreen and ProArt displays and therefore I couldn’t follow, not for real, although ThinkVision M14 and Librem 5 setup clearly (without add-on peripherals) presented.
Now, @ookhoi, if you attach SuperSpeed USB (USB 3.1 Gen 1) USB Type-C™ male connector of externally/directly powered Delock 64062 hub (that you presented here earlier) to the one side of ThinkVision M14 USB-C DP1.2 female port and Librem 5 directly to the second (while power pass-through connected with each other) USB-C DP1.2 female port would your Librem 5, besides hopefully being able to be charged from this (or any other) Dock/Hub and present its content on here correlated 14-inch screen, be able to get/exchange there connected data (including mouse/keyboard) with Delock 64062?
I’m expecting (as based on my question) that M14 display will consume up to 7.5W (5V/1.5A) and therefore Librem 5 should get almost 7.5W of power as well.
Power supply −> Hub USB-C PD port … Hub USB-C male connector −> M14 right USB-C DP1.2 port (Switch-On might be tested now) … M14 left USB-C DP1.2 port −> Librem 5.
EDIT: Otherwise (if above proposal doesn’t work with ThinkVision M14) you’d be in need to do another test/proof of adequate docking station with built-in DP1.4 output/port (for example: https://www.aliexpress.com/i/1005005926580411.html) where you’d need to use bi-directional USB-C to DisplayPort 1.4 cable (https://www.aliexpress.com/i/1005006677028979.html) on one connection side of ThinkVision M14 and connect second power supply to the other USB-C DP1.2 port, to the opposite here related monitor connection side.