blocked iPhone by hacker "lost iPhone"

If you logged in somewhere with your credentials, you’ve probably just handed your Apple ID over to somebody.

Maybe you can recover it. maybe. if the scammers are any good, your Apple ID is permanently gone, your passwords are all exposed, a\your payment cards are exposed, basically…. Bad.

Start here, and maybe you can wrest control back:

… If you think your Apple ID has been compromised - Apple Support

ai2345 wrote:

my iCloud is still on me. The hacker blocked iPhone by button "lost iPhone" and changed password to access iPhone

Okay, so it seems yet worse.

You’ve seemingly lost control of your Apple ID and will want to address that with the previous links, and have seemingly also lost control of that iPhone: If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support