So I was trying to find an under the desk dock for my MacBook Pro and couldn't so I remixed a few different models I found on Printables. I had to scale up the desk mount by 22.5% for my 16" MacBook Pro to accommodate the case. For the USB Dock, I used the USB Connector File from the second model I found. I had to scale it up 1% to fix the connector on Amazon listed below. All of the changes should be in the print file here. If you have a smaller MacBook, you may need to scale down the mount, but don't scale down the USB C Connector part.

https://www.amazon.com/dp/B0C5ZRYD3J?psc=1&ref=ppx_yo2ov_dt_b_product_detail

Used double sided tape to stick the USB C Connector to the cable management box under the desk. This is a Herman Miller standing desk but I'm sure others have a similar structure you could mount it to.

It works pretty well and I just slide my laptop in when I get to my desk and everything turns on. If you have any questions, let me know.