"To see the evidence" means to look at the proof or facts that support a claim or argument, in order to form a better understanding or make a judgment about something. Full definition
I didn't see any evidence of on - going research, and I didn't receive any professional publications. (loe.org)
We did not see any evidence of improvements in the immune response. (sciencedaily.com)
While we didn't see evidence in this demo, we were told by staff that this seemingly random encounter and others like it will impact the narrative of your story. (mammothgamers.com)