It is not advisable to have someone do major surgery on the bottom end of an engine who isn’t able to diagnose the noise that prompted the surgery. Those of us who read posts here are limited to the information as can be gleaned from them. And if the engine died as a result of seizing, subsequent to the knocking, further speculation here is futile. If you attempt to start the engine and it will not ‘turn over’, it is likely beyond hope.