I was looking for the same answer.
I just watched this video: https://developer.apple.com/videos/play/wwdc2022/10041/
Around 26:50 it's about the identity Apple Wallet buttons and I tried it out for the PKAddPassButton, it's the same principle (checked in iOS 15.5):
The button itself decides, if the title label has one or two lines, depending on the space it has.
Tine74
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Seems like a Bug in WebKit for me.
I don't use admob and WKWebview ist not on the first ViewController.
The App can be used without the warning until a WKWebView is called for the first time. Then the warning appears.
So these lines of the thread seems the important one: