Yes it is. The researchers propose various pathways for how life may have first developed, then they go into the lab and see if those pathways are chemically possible. The lab results that show the pathways are possible are supportive evidence for those pathways.
You're exhibiting a type of black/white, all-or-none thinking that is common among fundamentalists. In this case, you seem to be under the impression that such results are only "evidence" if the researchers can absolutely prove that the specific pathway being tested occurred. Of course to non-fundamentalists, you can have evidence that something took place even though you can't absolutely prove it happened.
Take archaeology as an example. An archaeologist suspects that a N. American coastal tribe traded with an inland tribe, so he goes to an ancient inland site and starts digging. He finds artifacts that are from the coastal tribe. Guess what? That's "evidence" that supports his hypothesis, even though he hasn't absolutely proven that the two tribes engaged in trade. In fact, unless he finds written records he will likely never "prove" that the two tribes traded. More likely is that he'll accumulate enough supporting evidence to reach a solid conclusion that they traded.
That's how science works. You should take the time to learn the basics before you try and debate a subject.
Your fundamental misconception of how science works is noted.
If your archaeologist KNOWS those tribes existed, and has artifacts, evidence, that trade occurred, then his hypothesis isn't proven, but he has supporting evidence. So now lets assume he has no concrete knowledge that any tribes existed in the area, but he suspects it is possible, but he doesn't know who they are, or whether they traded at all, or what their artifacts looked like, so is what he dug up evidence of anything ?
By the same token, if you cannot state that abiogenesis occurred, and if you can only postulate on a series of possibilities that don't confirm that it occurred, but only marginally show under the circumstances you provide that a tiny step could have happened, you have evidence of nothing but a tiny step that COULD have happened, evidence of nothing. The standard is beyond a reasonable doubt in a criminal trial and the preponderance of evidence in a civil trial. Once the standard is met, the case is considered proven. So, here is how science functions, speculation and theories about envisioned possibilities. Possibilities, not FACT. Various idea's are tested in ways that COULD have happened, but no one knows they did, nor do they know the environment in which these things MIGHT have happened, in environments which MIGHT have existed. You wind up with an example of what COULD have happened, in an environment that MIGHT have existed, leading to evidence of something you CANNOT say for sure did happen. That is a theory, with no real evidence to support it. That's science, that's theory, your evidence is possible evidence of something that might have possibly occurred. IT FAILS. It has no more credibility than me saying God created life
Your fundamentalist mode of black/white thinking is noted.