Apple ID

Check this: Change your Apple ID email, password, or profile picture - Apple Support

• On iCloud.com: go to Account Settings, click the picture next to your name, then drag an image file onto the picture. Or click Choose Photo, then follow the onscreen instructions.
• On your Mac: choose Apple menu  > System Preferences, then do one of the following:
  • macOS 10.15 or later: click Apple ID, click the picture above your name, then select a new picture.
  • macOS 10.14 or earlier: click iCloud, click the picture above your name, then select a new picture.
• On your iPhone, iPad or iPod touch: go to Settings > [your name], tap the picture above your name, then follow the onscreen instructions.