By His own choice, there will be no logical proofs or empirical tests to "find" Him.
Where [is] the wise? where [is] the scribe? where [is] the disputer of this world? hath not God made foolish the wisdom of this world? For after that in the wisdom of God the world by wisdom knew not God, it pleased God by the foolishness of preaching to save them that believe.
For the Jews require a sign, and the Greeks seek after wisdom: - I Cor 1:19-22
Nevertheless, we can observe and be amazed at His creation and see His hand in everything!
Others may be in awe of God by seeing a newborn child, a cathedral, a mountain range, a glimpse of deep space, hearing certain sounds and so on.
God is not a hypothesis. He lives. His Name is I AM. I've known Him for a half century and counting.
Indeed, I know Him better than I know my older brother. No one doubts me when I tell them about my older brother, but yet some doubt me when I tell them about God. LOLOL! Go figure...
Yes, we can. Which is why I don't get the attempt to single out one part of creation and insist that that should "cause" people to recognize that God is the creator. You held out the coexistence of istropy and anisotropy as a "challenge" to atheists, asserting that if they couldn't explain it, they had to recognize Divine Providence. And my question is, what if they can explain it--if not now, someday? Does that somehow diminish the idea that God is the Creator? If there are no logical proofs to find Him, why do you propose one?