Hello @Josiah Ewing,
Thank you for posting your query on Microsoft Q&A.
As you mentioned, the Global Secure Access client does not currently support the Arm64 architecture. You’re asking for a preview or timeline regarding when this might be supported. Unfortunately, there is no information available at this time on when support for ARM devices will be introduced, as it has not yet been decided. But you'll get notified through the public blogs and documentation if it's supports for ARM devices.
Global Secure Access client for Windows
I would recommend posting this idea on the Azure Feedback Portal, which is monitored by the product team for potential feature enhancements. It's also helpful to vote for ideas that you'd like to see implemented.
I hope this information is helpful. Please feel free to reach out if you have any further questions.
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Thanks,
Raja Pothuraju.