Upside-down pictures on iPhone after soft reset

Try a hard reboot and see if that will help.

To hard reboot (force restart) an iPhone, you need to quickly press and release the volume up button, then the volume down button, and then press and hold the side button (also known as the power button) until the Apple logo

Sounds Crazy! Is this only the Photos app, or is it everything? Is it all pictures, or just recents, or just screenshots, or just pictures from Messages, or what?

Can you edit these pictures? Can you go to Edit>Crop and rotate them?

• Are you using iCloud Photos to synchronize your devices? If so
• …Do you have “Optimize Storage” checked in Photos’ Settings
• …Do you see all your iPhone pictures at iCloud.com? Are they right side up?
• …Do you have more than 10% free storage on your iCloud account?
• What is your storage on this iPhone? At Settings>General>iPhone Storage, my phone says 50.5 GB of 128 GB used. What does yours say?
• Do you have more than 10% free storage on your iPhone?