Bloomberg:

Apple Inc., suffering from a global supply crunch, is now confronting a different problem: slowing demand.

The company has told its component suppliers that demand for the iPhone 13 lineup has weakened, people familiar with the matter said, signaling that some consumers have decided against trying to get the hard-to-find item.

Demand may be slowing (not sure how to measure that outside of Apple), but the iPhone 13 is not hard to find. At least in the US, you can get a base model Sierra Blue iPhone 13, 13 mini, 13 Pro, or 13 Pro Max within a few weeks at worst.

I didn’t do an exhaustive search through all possible color/storage combinations, but “hard to find”? Doesn’t seem to be the case. Easy enough to check this for yourself.