Hi @ComputerHabit,
Thank you for posting in this community.
First of all, congratulations on solving your problem and letting us know.
However, since the Microsoft Q&A community has a policy that "The question author cannot accept their own answer. They can only accept answers by others." and according to the scenario introduced here: Answering your own questions on Microsoft Q&A, I would make a brief summary of this thread:
[Can't change "Microsoft SharePoint Foundation Subscription Settings Service" in Farm Services.]
Issue Symptom: Microsoft SharePoint Foundation Subscription Settings Service can't edit in SharePoint Farm System Settings
Current status: The Central Administrator URL has been moved from the Trusted Sites zone to the Local Intranet Zone.
You could click the "Accept Answer" button for this summary to close this thread, and this can make it easier for other community members to see the useful information when reading this thread. Thanks for your understanding!