I do not have the option to tun on two-factor authentication on my iphone se

Is your iPhone SE 2nd running iOS 16.5.1? If not, update your iOS, and check again.

Here is how to: Update your iPhone or iPad - Apple Support

…and how to enable: Two-factor authentication for Apple ID - Apple Support

erniegl wrote:

My phone is updated to iOS 16.5

When following the Apple Support instructions and I go to password & security under my Apple I.D. I do not get the option to turn on tee we o-factor authentication and enter a trusted phone number.

I have another iPhone SE and the option is there.

Log into AppleID.Apple.Com and check the two-factor settings and trusted numbers and such there.

iOS 16.5.1 is current, though that won’t be a factor here.

2 Factor authentication applies to your Apple ID, not the device.

Two-factor authentication for Apple ID - Apple Support