I don't if it's just me that noticed about this on the iPhone X?

So Apple is having trouble with their true depth camera for the iPhone X, what I don't get is why are they struggling? They already had models that the true depth camera works. And tim cook already has an iPhone x!

They aren't struggling with them in terms of issues with it. Its a matter of yield issues. Making enough for mass production in time to try to meet the demand.