This is the wrong question. Of course we are real! Whether we are living in a simulation or exist in an external objective material reality, we are real either way. The better question is, "Is Materialism true?" The answer is a resounding "NO", Materialism was a good approximation that got us by for quite a long time just like flat earth theory and geocentric universe theory did before it. It is becoming increasingly apparent that Materialism is in it's death throws and will soon be replaced by a virtual reality model of reality within the framework of Idealism.
First it will be granted that virtual reality is a superior model, but people will still maintain that it is simulated in a material reality on a material computer to save their cherished belief in Materialism for just a little while longer.
Then, after getting used to the idea of loosening one's grip on Materialism, it will be granted that the computer that is simulating this reality is consciousness itself. Consciousness is the computer.
It is only a matter of time. It will be a long drawn out fight against belief, but in the end reason will prevail. Enjoy the ride.