Hello, does Apple support ever reach out via text message about a lost phone?

Dear Apple Customer:           

Our system detected that your offline iPhone was in the process of repair or replacement in the Apple After-Sales Service Center, the case number is F4R95880. If it is not you, the iPhone owner, who applied the service, or you have lost the iPhone, please login to https://Apple.gps-sign-in.net/us to verify and cancel the service. If it is verified that you did lose the iPhone, we will intercept it, and inform you to take back as soon as possible. Please prepare your purchase voucher.

Apple Support