phone keeps turning off

Hi there samanthapcast,

To confirm, is your iPhone SE turning off and then you need to turn your iPhone SE back on with the Side Button or is your iPhone SE restarting (where you don't need to press anything for it to turn back on)?

If your iPhone is unexpectedly restarting, check out the information below, which might help resolve this for you:

"Check your software

Make sure that your device has the latest version of iOS or iPadOS and that your apps are up to date. If the issue continues after updating your software and apps, check your hardware.

Check your hardware

On an iPhone 6 or later, check your battery health under Settings > Battery > Battery Health.

If your battery doesn't need service, and your iPhone, iPad, or iPod touch continues to frequently restart or turn off, contact Apple Support.

If your device has a frozen screen, doesn't respond, or becomes stuck when you turn it on, learn what to do for iPhone, iPad, or iPod touch."

That information is from this article: If your iOS or iPadOS device restarts or displays the Apple logo or a spinning gear unexpectedly - Apple Support

Please let us know if that helps or if you're still encountering the same issue with your iPhone SE after doing those steps.

Take care.