You're still using far too narrow a definition of "life". Even in our universe (as opposed the universe as it might have been, whether or not there are other universes) there are many opportunities for complexity to arise beyond mere chemistry. Chemistry seems obviously necessary to us, because we happen to have arisen in a chemical milieu, but to a being who is composed of Alfven waves in the interior of a star, or who depends on the "neutron drip" nuclear chemistry on the surface of a neutron star, or who consists of bound plasmas in the horribly complicated magnetic fields of a supernova remnant, or who is composed of superfluid eddies in a pool of liquid helium on an intergalactic planetoid, the Earth seems as inhospitable a place as could be imagined, and organic chemistry wildly inappropriate as a basis for life.
See it this way, for other Earths we have only one test case, but for your idea we have nine test cases plus about 50 moons of pretty good size. No advanced life has developed on any of them, and probably no mirco-organisms either- despite the fact some have probably been "seeded" by earth biotics (from ateriod impacts blowing chucns of earth into space).
If we find any sort of life anywhere in the solar system except Earth, then life is outrageously common, bank on it. I don't expect we will, but that doesn't won't that life isn't common across the galaxy.
Life is very "common" given the omnipresence of complex carbon chemistry, water, and planetary systems across the inconceivable magnitude of galaxies. Intelligent life is less common, but still widespread even here in the Milky Way, our modest home galaxy of hundreds of billions of stars.
Finding some relic sign of non-human sentience would be one of the most interesting discoveries in the history of our sad little species, yet also an event that would be surprisingly insignificant.
For would not another self aware species not have the same existential issues that we stare into? We live for but a brief moment destined to die, challenged by the same potential for courage, love, honesty, decency, bravery and integrity. Are not all those born into this cosmos, in the most fundamental sense, all the same, within the sentient wombs of our nervous systems?
Any other kind of life is just pure speculation. It is not based on fact. Look, I really wanted it to be the other way. I wanted a Star Trek universe ever since I was a kid. Alas, the facts (so far at least) overwhelmingly point in a different direction. Hang on to your speculation if it brings you comfort- and ping me right away if they do find what you are looking for. I will rejoice with you.