Why is my iPhone 13 restarting every six minutes or so

Hello ~ Take a lot here by clicking on and working through the steps here…

If your iOS or iPadOS device restarts or displays the Apple logo or a spinning gear unexpectedly - Apple Support

Also a forced restart may help…

Force restart iPhone - Apple Support

~Katana-San~

same here, started today for my iphone 13 mini. I updated my phone to the ios 16 recently (within the last week/two) and its the likely culprit of deprecating my phone... very frustrating. I got this phone so recently.