@Watson, Steve (SACE),Thanks for posting in Q&A.
From your description, I know the MS Wifi Display Dongles cannot connect after Intune was rolled out.
Based on my research, there may be some configuration under Security Baseline that have not configured yet.
Here is a link about how to resolve Wifi display connection issues you can refer.
https://www.leonsitblog.com/2020/01/resolving-wifi-display-connection.html
https://www.reddit.com/r/Intune/comments/tnx62n/ms_wireless_display_adapters/
Non-official, just for reference.
Hope above information can be helpful.
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