I'm taking Mari DeGrazia's FOR528 class, and she made note of the issue she mentioned to you about Registry Explorer not handling the Registry Redirection for hives stored under the packages folder. I was looking to see if you'd done something about it in the interim, but didn't see an issue anywhere, so thought I'd file one here to track it officially.
For reference: https://www.zerofox.com/blog/the-registry-hives-you-may-be-msix-ing-registry-redirection-with-ms-msix/