Bluetooth in Bootcamp

Bluetooth in Bootcamp is not functional. It does not allow for more than one wireless controller to connect at a time and, when using wireless headphones, audio cuts in an out the moment a second Bluetooth device is connected.

In device manager, I do not have anything titled "Apple Broadcom Built-in Bluetooth" nor do I have an option for bluetooth collaboration under advanced settings for Broadcom Network Adapter. I have tried using version .3 and .4 of broadcom driver to no avail. Below are screenshots from device manager.

I was on the phone with Apple Support and they say that they are not responsible for fixing this, and that I should talk to Microsoft. Microsoft was also unable to help me. I have tried updating windows, updating Bootcamp, reinstalling Bootcamp drivers from usb, and fresh install of Windows. Nothing's worked.

Any help would be appreciated.

Background info:

MacBook Pro 16": Core-i9 2.3GHz, 32GB Memory, Radeon Pro 5500M 8GB