Your analogy doesn’t work. The Church is not an inanimate object. The Church is the Body of Christ.
“That is what is meant by God’s grace being demonstrated through the church with the church being the teaching aid - the object lesson.”
Manifest wisdom of God. That is what is taught by the Church to the angels, not “God’s grace being demonstrated through the church with the church being the teaching aid”: “so that through the church the manifold wisdom of God might now be made known to the rulers and authorities in the heavenly places” (ESV)
“A little more clear now?”
Is it clearer for you now? I suggest you actually deal with the verse and not essentially claim it says “God’s grace being demonstrated through the church with the church being the teaching aid”.
Does this apply to you; too?