Science uses a pretty wide definition of “earthlike” that would include everything from Mercury to Mars. I wish they would use another term but that’s the only one the media is interested in.
To me these planets are no less interesting but the idea of finding a truly “earthlike” planet is nearly astronomical. “Life supporting” or “potentially habitable” are better words.
The most “Earth like” planet ever discovered is almost exactly the same size and mass and orbits an identical star at close to the same orbit.
It is called Venus. Not very habitable though.