I accidentally lost my iPhone and I think I erased it and it's asking me to remove??? Please help me find my phone

Hi

Follow the instructions here:

If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support

Apple will never tell you to remove your phone from iCloud. You probably got a phishing message from the thief who is hoping that you will think it is from Apple and you will remove Activation Lock so he can use it or sell it.