Yubikeys are great for securing online accounts, but they are not particularly easy to find a home for on your desk. I am a user of the less expensive USB-A Yubikey and it has a major issue. Either it sticks up vertically in a USB hub or it sticks out of the side of a laptop so far that it is easily broken off by accident by simply pushing on it.
This mount is my solution. Using a standard USB-A male to female extension cable you can place the key anywhere you can find to stick it. The mount has a support underneath the Yubikey so it will not flex when you press the gold disk to generate a code.
Assembly:
Note the section for the USB head and the Yubikey have some extra length as some USB heads are a bit longer.
Here is mine mounted on my Streamdeck.
Required Yubikey:
https://www.amazon.com/gp/product/B07M8YBWQZ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1