You appear to be moving the goalposts. These are all concepts. God is not as real as Money or Love or America. You're conflating several things here to try and obfuscate that the existence of God being proven isn't a "big deal".

You've ironically created the best counter to your statement by making the claim that it's as real as 3 abstract concepts that are all man made.

If something is real, it can be proven, observed, the effects replicated. This is how every thing in the universe works. No exceptions.

Money can be proven, even the idea of it, even though it's "conceptual". It has real value, it's a construct we created and it has physical objects in the real world and can be exchanged for goods and services. It's a real idea that takes physical shape in the world and it can be proven as a real world concept that we are 100% in control over. The idea of money changes over time, as our understanding of it grows and improves (or devolves). It is an abstract concept to explain a very real thing that exists in our world. Which we created.

Love is a concept, and while the nuances behind it aren't well understood, it's as real as anything anyone feels, like hate, fear, or any emotion. It's an emotion, and emotions are a part of the human empathic experience. It's something we've evolved and learned over time. It's real because we make it real every day. Love isn't existential, it doesn't have some power we're unable to measure. It can't bend or warp or shift reality. It can't do anything more than we can do as a human. In all the ways that matter, any result of love is 100% measurable and observable in the physical world, no matter how it manifests it is observable and measurable in the real world. It is an abstract concept to explain a very real thing that exists in our world. Which we created.

America is a real place, a real continent, a real country, with real people, and while the idea of a country or its people changes over time, it's not "fake" or made up, in the same way a claim about a deity is. The idea of America might be what you're referring to, but it's as real as any other shared idea or dream people have had in history, including Rome, the EU, etc. It is an abstract concept to explain a very real thing that exists in our world. Which we created.

God is not a real place. It is not anything more than an abstract concept that we shoved everything we didn't currently understand into the category of for thousands of years until we developed the tools and systems to better explain the world around us. There are real things from this abstract concept, like churches, and bibles, and books, and songs and stuff like that. All things humans created. None of the spiritual claims have ever been proven true, despite an insane amount of testing and observations made over millennia. There's nothing repeatable here. The only things we can observe about God that can be measured are the things the followers of the religion do. There's zero things we've observed or measured with regards to religion in the real world that have ever gone beyond the physical abilities of what a normal human or collective of humans can do. It is an abstract concept to explain things in the world we couldn't explain before.

And like the concepts you called out: Love, Money, America; God is also a concept that humans created.