I love mine too....could not be more pleased with it in every way!! I've owned F-150s, old style Rangers, and one new style Ranger, but the Mav is the best of all worlds!
From my past one experience cancelling an extended Ford warranty, in 2020, you have to formally notify the dealer in writing. They also may have a form you have to sign. Keep track of who and when you spoke to as well as a copy of the notice. It takes a few weeks but it worked out ok. Good luck!