Where Is My “Hidden” Photo Folder In iPhone 11 Pro Photos App?

On May 6, 2021, I selected several photos and moved them to the “hidden” album. Now I can’t find the hidden album folder when I go to the Albums section of my iPhone Photos app. I used to see “Other Albums” by scrolling to the the bottom of the Albums page, but now there’s nothing! Where did my hidden photos go – and how do I access them again?
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Barbara