This sucks! I heard the cam phaser rattle at cold start yesterday. My Raptor was built in July-2019 with 6800 miles. I've already had two oil changes with Penzoil Ultra Platium full synthetic oil thinking this would help, it didn't. I had my dealer order the parts just now, he told me they won't even give him an ETA on the parts it's so far out. he said they redesigned the phasers in Sept 2019 but who knows how many engines were sitting there with the old phasers waiting to find a home. He said it's ok to drive it but Damn Ford, this is my third Raptor and every one has given me some problems. It's frustrating to know this problem has been going on for so long. Ok, I'm done venting.
Please post a video if you can. There is no documentation of a part number change in Sept 2019; sounds like the dealer is just guessing.