@Lee Moreau Thanks for your posting in our Q&A.
Currently, it seems there is no such setting can be configured to disable IPv6 via intune. It is suggested to try to write a powershell script to disable ipv6 and deploy this script via intune. Please refer to the following article about deploying scripts:
https://learn.microsoft.com/en-us/mem/intune/apps/intune-management-extension
If you are interested in having an intune built-in setting, it is suggested to post in intune feedback portal. This is a place to collect customers' requirements and problems.
https://feedbackportal.microsoft.com/feedback/forum/ef1d6d38-fd1b-ec11-b6e7-0022481f8472
Thanks for your understanding and hope it will happen in the future.
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