@stardust Hey, someone commented to point out that the <meta> tag option is actually not feasible.
I've since amended the blog post stating as much, and linking to the following issues that discuss it:
So, until GitHub pages adds support for custom headers, the few types of headers that are valid via <meta> tags does not include "Permissions-Property".
You can always switch to Netlify perhaps (it can build from GitHub directly).
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