iPhone 15 Pro - display gap on the bottom, is this normal?

Bought this 15 Pro and had it since launch, recently, I noticed that there was a gap on the bottom of the display that would fit a piece of paper and my thumbnail, the top doesn’t do this at all, I was wondering if this is normal or if i should contact Apple, main concerns are if this has a good water seal / resistance and if it’ll still be normal with this gap present, any support will be appreciated. (Only option is send in as I live 40mi+ from an Apple Store)