We really don’t know the exact answer to this.
But what we do know is God is far more merciful and gracious than we can comprehend.
You said:
“We really don’t know the exact answer to this. But what we do know is God is far more merciful and gracious than we can comprehend.”
I agree. I cannot see a merciful God and Jesus NOT sending angels to bring the souls of babies that die back to heaven.