Stolen iPhone bypassed passcode, changed Apple ID, and disabled Find My

I need urgent assistance with my stolen iPhone. My device was stolen, and the thief has somehow managed to bypass my passcode and security settings..It appears that the thief guessed my passcode and was able to bypass the screen lock. They accessed my device and changed my Apple ID details,I tried using the Find My app to locate or lock the iPhone, but it says the device cannot be found. It seems the thief has disabled Find My iPhone or logged me out of my account on that device…I want to permanently locked the stollen device so the person won’t be able to use it anymore

[Re-Titled By Moderator]