I know that it’s a common belief in atheists that it’s not a faith. But if you take a step back, it’s hard to deny that there is some belief in the sentence: “if science has neither evidence of something nor of its absence, it doesn’t exist”.
The opposite of that is: “if science has neither evidence of something not of its absence, then science doesn’t know yet, and until then, neither can we”.
It’s fine to believe in things. I’d say it’s not great though, to think so highly of one’s own belief that one wouldn’t want to call if a belief.