I was skeptical, but a fan does seem to help

Also, there’s some folks who designed a “Lid” for the trashcan that has a built in USB fan that helps a lot.

They even include the USB-C adapter with their lid:

https://www.etsy.com/listing/1087066451/t-mobile-trashcan-lid?click_key=e21c58e6be00ae317afbed39752cb2599906d32a%3A1087066451&click_sum=75d83ad4&ref=hp_rv-1&frs=1&sts=1

This Lid will pull the air up and out, which I personally think is more effective in cooling - like how your PC fans would pull the air out of the box vs pushing air in.

I just ordered a tiny 40mm unit and a converter since my situation is with the KVD and it's on a shelving system.  The fan will be mounted to bottom of the shelf above the KVD to pull air from the shelf.

As you can see, I don’t have really any extra “room” to put anything on top of or below the gateway here - but how it sits right now is the “optimum” position for signal and speeds in my apartment.