"It turns out that Xcode is also using the same domain to host an API for their cloud CI/CD offering. (hypothetical example) ..." By "domain" I think you mean

"It turns out that Xcode is also using the same domain to host an API for their cloud CI/CD offering. (hypothetical example) ..." By "domain" I think you mean a full FQDN and not a top-level "apple.com" and I agree that this is troublesome and then go further and suggest that this is by design.