How do I report my phone stolen

The link that @Raicya has provided should give you the information on how to go about erasing your stolen iPhone. The key is that "Find My" was required to be enabled BEFORE it was stolen ... otherwise, there are no option to either track or erase the phone. As such, as a minimum, immediately, change your Apple ID's password.

Ref: If you think your Apple ID has been compromised - Apple Support

My IPhone was stolen yesterday and I would like to have that phone wiped clean and disabled so the thief won’t be able to use phone.

The Complete Guide:

▷ Follow these important steps.

▷ Call 1-800-MY-APPLE.

▷ Learn how to file a claim.

▷ Get Support.

▷ Download the Apple Support app.

See -> If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support

Already answered if you read the information in the Apple Support document linked above Here it is again:

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

This is a new phone I had to purchase today.