How do I enable Markup option for photo editing on iPhone 16 Plus?

I am trying to mark up a photo and the pen doesn’t show up on my photos to highlight. I checked the magnifying tool and it is turned on. I restarted my phone. How do I get markup to appear on my photos when I hit edit?

Very frustrated.

[Re-Titled by Moderator]

Original Title: iPhone 16 Plys