ComcastJohnN had the magic touch! It's all working now.
Long story short, to make sure the IPv4 is active, the proper MAC id was needed. The wrong MAC was used during the initial setup, but even through other customer service levels couldn't correct it because the old MAC was "stuck" in the system, someone of JohnN's level could manually remove the old & enter the new (correct) MAC & reprovision, then everything works fine.
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