Existence itself is evidence.
Or, maybe I could say: Existence existing is the evidence.
Regardless of what we can know about existence, we know for sure that something must exist.
Could this question not exist?
And something must account for whatever exists (whether or not we can know anything about it).
Either existence came from something, came from nothing, is really a dream, is really a computer simulation… Those are all accountings.
Perhaps when we look at existence from our human perspective and scope, we account for it all with a thinking, creative Being.
Is that accounting necessary?
Let’s call whatever actually accounts for existence “God.” Must God be a person?