They do, actually. If you look up the Halide camera app, you'll see a great example of this.
I certainly was surprised to see the sentence:
"Privacy practices may vary, for example, based on the features you use or your age."
I filled in the questions in app store connect recently, and since it is just a simple game without anything remotely privacy invading, I happily answered all the questions in the most "privacy respecting" way. To then see this sentence hinting that the privacy stuff might be different if people use unspecified features, or be particular ages... that is certainly a surprise.
See screenshot: https://share.barkerja.dev/4vgEhw.jpeg
"We may collect <x,y and z>, for example <most benign use possible>"
"We may collect your date of birth, for example to wish you a happy birthday!"
I think "for example" sentences should be disallowed.
For example, if your feedback form allows users to optionally enter their email address so you can contact them to request more details if needed, you don't need to specify that you collect email addresses if you never otherwise collect email.
It is not clear if this would also apply if users can optionally upload a profile photo, but profile photos are not a core part of the app (e.g. not a tinder clone). If it does apply it would let you omit the scary sounding 'user photos' option from the privacy list.