not necessarily.
there are parts of the ocean that have no oxygen, and will not sustain life. totally barren. there are desserts where while there is life, it's very few and far between.
mars might have life, but it certainly isn't everywhere, or we'd have seen some of it in the millions of pictures sent back.
space is void, lifeless. a tardigrade or cockroach may survive, but you don't see them flying around all over the place out there.
our neighboring planets are lifeless. perhaps there's something on one of the moons, but it's not plainly visible even if it does exist there.
omnipresent means being everywhere at once. i think you may have misused this word.