need to remove passwords from ONE iPhone 7 plus
Key chain accidentally stayed on phone given to another person ~ I need help removing it without this person reseting the phone and starting over ~
iPhone 7 Plus, iOS 13
here is a support article detailing what you should do before you give away a phone.
What to do before you sell, give away, or trade in your iPhone, iPad, or iPod touch - Apple Support
The phone should be signed out of iCloud and reset to factory settings (wipes the device, I know it's not what you want).