I tried to build your sample app Coffee Tracker WatchKit App under Xcode 13 and it failed with the message "Cannot find type '<#Value: BinaryFloatingPoint#>' in scope" on line 12 of CoffeeData. I was building the Starting Point, and the updated without modification, same result.
Please show the code where the problem is. It will make it easier than searching what exact code you are copying.
Use Double as the expected type:
private let floatFormatter = FloatingPointFormatStyle<Double>().precision(.significantDigits(1...3))