Iphone 11 pro stolen case

Hi

Someone stole my iphone and open myfind service and click lost mode. After 1 day i receive msg on my number from apple "Your iphone is locating etc.....". i receive this msg from the number which i receive two step verifaction code from apple. i receive this msg from the number which I receive a two-step verification code from apple. And when I open myfind service I see no device data available. please tell me what happened.