I can’t find the icon to change my passcode on my iPhone in settings

Hi Kartara,

To change your iPhone passcode, open Settings > Scroll down until you see 'Face ID & Passcode' or 'Touch ID & Passcode' > Enter your current passcode > and scroll down until you see 'Change Passcode'.

You can find more info here: Set a passcode on iPhone – Apple Support (UK)

Hope this helps!