Deleting photos after creating a new Apple ID
I just took my phone off my parents' apple id and moved it onto my own brand new one which I just created. It saved all my photos that I had taken when my phone was on my parents apple ID, but I wanted to delete some of those and keep others. I selected all the ones I wanted to delete, tapped the trash can button, and thought they were deleted. I checked again this morning, and all the photos, both the ones I wanted to keep and the ones I wanted to delete, were still there. How can I delete the photos I want to so they're removed from my phone and apple ID?
iPhone 11 Pro, iOS 15