Hello, Dave, As I had advised you, since I bought Airpods MAX in December 2020, I faced this problem (I cannot reset Airpods MAX by pressing both digital crown and noise cancelation button and lost the connection with iOS devices and/or Matintosh which runs Mac OS 11.2.x) 3 times, and requested Apple Support in Japan to exchange the bad one with the new one, 3 times so far. I am currently using the 4th alternative Airpods MAX since 15th March 2021, and it is working fine so far. This trouble occurred every 3 weeks, to date. (Exactly every 3 weeks! I, however, recognize that you got the same trouble after 10 days when you received the alternative one.. ) I hope that this alternative will be working fine for at least one year...
Both Apple Japan support and Apple Store in Japan told me every time that they have never heard of this miserable story from other users, but, I could recognize that the same problem frequently occurred in U.S..
I am afraid that Apple hides this trouble happening on Airpods MAX from their customers. I cannot trust Apple support any more for this product.
Apple must clarify the root cause of this trouble after their intensive examination and let us know about it.