I lost my iphone

Hello ~ Did you have find my activated on your iPhone beforehand? If so take a look here:

Use the Find My app to locate a missing device or item - Apple ...

Also read both below. If yo have AppleCare +Theft and loss read how to file a claim in first link and what to do in second:

File an iPhone Theft and Loss Claim - Official Apple Support

If your iPhone, iPad, or iPod touch is lost or stolen - Apple ...

~Katana-San~

Hi, waqar296!

Thanks for posting on the Apple Support Community. I understand you lost your iPhone and want to locate it.

You can visit this website and sign-in with your Apple ID to view the location of all your Apple devices. Make sure to enable lost mode too.

I hope this reply was helpful. Stay safe.