We, as part of the created universe, would have no way of detecting something from "outside" our universe.
So...we have to use other methods.
The clue will be in the Kalam Cosmological Argument (q.v.).
The universe might not yield provable evidence--the absence of evidence is not evidence of absence--but the universe could not have CREATED ITSELF.
One can "beg the question" all day and posit brane theory for creating our universe, but sooner or later, you have to pay the piper and ask where the first created universe in our posited multiverse came from.
The answer is always: from OUTSIDE. From an intelligent source not bound by our laws of matter and energy and time. This is hinted at in Genesis, also in Pslams, Isaiah, and other books. How could they have known, 3,000 years ago?
Judeo-Christianity doesn't have a giant turtle holding up a flat earth. It doesn't invoke Atlas. It doesn't say the universe came from a cosmic frog egg that hatched.
The Judeo-Christian worldview, of all religions, very nearly aligns with scientific theory in sequence of what was created. It's remarkable, when you roll up your sleeves and look into it. Remarkable.
The biggest question of all is this: Why should there be SOMETHING...instead of NOTHING?
The origin of life on Earth is a toughie in its own way. We may identify some number of scenarios by which it may have happened. We may create life from non-life in the laboratory. Even if we do, creationists will only cite the demonstration as proof that life is designed. At any rate it won't prove that the original abiogenesis event happened along the same lines.
Both of these questions are separate from whether life on Earth now is the result of common descent diversifying via variation and natural selection. This one already has a huge preponderance of evidence for it, none against, and must be taught in biology classes if biology is to be properly understood.
Miller and Urey did not set out to produce life (abiogenesis) but they did demonstrate how, under certain conditions, biological molecules could have been created via an abiotic (non-biological) process.
Are you citing this work as a example of ID experimentation?