Hi Drake E. De Haan,
Thank you for reaching Microsoft Community. We appreciate for sharing your concern to us.
Unfortunately, updating the firmware for wireless display adapters can only be done using the Microsoft Wireless Display Adapter app, which must be installed from the Microsoft Store.
If you experience problems with your wireless display adapter, we recommend that you follow the solutions provided in this article Troubleshooting Microsoft Wireless Display Adapter - Microsoft Support.
You can speak with your IT administrator for more help in downloading the app if the firmware needs to be updated, by using another PC if necessary.
Kind regards,
Lavenia