Why is it all these earth like worlds exist, but no signs of life ? This is the Fermi paradox.
Right now, we don't know enough to say.
We have found hundreds of exoplanets, but so far we have not found any that we know are actually "earthlike." The popular press is fond of throwing that term around, but at best, right now about all we can say is "we don't know that it isn't earthlike." Often the term "earthlike" means "like Earth in one particular parameter, although completely different in other ways." This particular one isn't earthlike; it's a close-in planet of a red dwarf, a star nothing like the sun.
--to be fair, the ways we have of detecting exoplanets hundreds of light years distant is very biased in terms of what we're able to see, and what are easiest to see are planets that aren't Earthlike.