I can't find the FaceTime icon on my phone think I accidentally deleted it help

You CAN't delete Facetime.

Where do you purchased this iPhone?

All devices from United Arab Emirates doesn't have Facetime by default due to local laws,

same thing happened to me. go to your general settings in restrictions, turn it back on there. then when u go to the icon, you can still turn it on and off. it will come right back.