How can I find my lost iPhone through the serial number

nordin304 wrote:

How can i find my lost iphone with seriel no tracking?

There is no tracking by serial number.

Serial number tracking would be massively misused.

Serial number tracking would be a catastrophe.

Were that tracking available, abusive domestic partners, crooks, thieves, stalkers, all would abuse that.

Find My is the available tracking mechanism: If your iPhone or iPad is lost or stolen - Apple Support

If Find My was not set up prior to loss or theft or whatever, Find My cannot be enabled remotely.