New iPhone 15 Pro lens display

You're not speaking with anyone from Apple here. This is a user to user only forum and Apple isn't here, nor do they read these posts for suggestions.

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I think tapping on the x1 will switch to the 24mm lens

If you are asking if you can permanently change the display to show focal length, no you can't. As you've learned, if you tap there, you can see it.

You're welcome.