Can’t see junk mail on iPad

Gee, most people want to hide their junk mail... Anyway, when you open Mail, the left column will show all of the In Boxes that your iPad is monitoring. Just below that is a list of those mailboxes in gray. When you click on this name the individual folders inside that mailbox will expand or collapse. With any luck, the mailbox you are interested in is collapsed and simply needs to be expanded. Good luck.