You don't need a otp para sa reporting lost ng iPhone 13 Pro mo, login mo lang ng iCloud Account mo doon then meron option doon na Find My sa baba, you don't need a 2 Step Verification on that.
Why except that option? Reporting stolen device kahit wala sa iyo ng sim isisign in ka parin niya doon sa device.
It's recommended to report to NTC para blacklisted ng imei.