https://www.amazon.com/s?k=vesa+mount+laptop+tray&crid=1X40JGG99KFLE&sprefix=vesa+mount+laptop+tray%2Caps%2C103&ref=nb_sb_noss_1

I would go with this one if I was doing this with my portables. I use this one currently with my work laptop

https://www.amazon.com/HumanCentric-Laptop-Monitor-Notebook-Secures/dp/B07RJZJVHF/ref=sr_1_9?crid=1X40JGG99KFLE&keywords=vesa+mount+laptop+tray&qid=1684461719&sprefix=vesa+mount+laptop+tray%2Caps%2C103&sr=8-9

Mount your hub to your pole or VESA Shelf depending on ascetics.

VIVO Steel Behind Monitor and TV 6 inch VESA Shelf, Low Profile Platform for a Small CPU, Router, USB Adapter, and More, Fits VESA up to 100x100, Black, Mount-SFVA1

Some of the Dell Docks can be mounted.

https://www.dell.com/en-us/shop/dell-docking-station-mounting-kit/apd/575-bbiv/pc-accessories#polaris-pd