i lost my iphone 13 how do i find it

If 'FindMy' was turned on then you can either access the FindMy app on another device that's signed in to your Apple ID or you can log-in to iCloud.com and access FindMy from a web browser.

Have you tried using iCloud.com/Find My Phone?

Find My Phone - Lock and track your device using Lost Mode.  * 

Find My Phone - If your device is lost or stolen. *