Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4249517.

I previously made a dock for my Sony Xperia XZ1 in the same way. (https://www.thingiverse.com/thing:3021838)

So I made one for my OnePlus 7Pro. This dock fits with the phone and the clear case that comes with the phone.

Video: https://www.reddit.com/r/functionalprint/comments/fqz8am/onehandedchargingdockforoneplus7procan_use/

You attach it to a table or any lip up to 44mm thick. Sandwich the USB C cable between the two halves. Install the heat set inserts into the Front piece. Screw together. Use the M8 nut and screw to tighten against the table.

I'm working on improvements.

2 x 4mm heatset inserts 2 x M4 x 20mm Screws 1 x M8 Nut 1 x M8 x 40mm