They could have been very busy with the garden and having children.
But how much were they really relating with the LORD? I know ones say they had sinless fellowship with God. But it doesn't actually say this. They were perfect creatures, but not perfect like Jesus who cannot sin.
So, if they had done things God said to do, that would not necessarily have them fellowshipping with Him. I suspect we now can do things "for" God, like He is at some distance . . . versus personally submitting to Him and discovering what He has us doing with Him in His peace . . . sharing, then. We all are
"called in one body" to personally submit to God in His own peace . . . so personal and submissive with Him >
"And let the peace of God rule in your hearts, to which also you were called in one body; and be thankful." (Colossians 3:15)
I would say this was not their relationship with the LORD. And our Apostle Paul says >
"for it is God who works in you both to will and to do for His good pleasure." (Philippians 2:13)
God was not in them, so personal that He was working their willing and doing in such intimate sharing with them . . . I would say. So, the relating was perhaps circumstantial, depending on when Jesus came along to talk with them. And we see what happened while He was not around.
So, maybe - - if they never had fallen from their creature state, I suppose they would have done creature things, and at times had a little talk with Jesus.
And no one could die, if there was no fall, I understand.
So - - after . . . some time . . . we on earth could be in a game of worldwide sardines, and then maybe we would start on more layers, which could double every so many years. That would take love, to get along in such close quarters
And we would be sharing with ones who had been thousands of years on this earth, but no one getting old. And if we all kept reproducing, I suppose there now would be some number of layers of humans . . . starting with two humans at least six thousand years ago, and each resulting pair reproducing once every year or so. Each child would grow to about one foot deep, two feet wide and six feet tall in twenty years; my rough calculations show it would take less than our first thousand years to coat the earth with humans, the first time. And then, of course, if all kept reproducing, at some point the coatings could double their number, every so many years.
So, in any case, I would say this was not God's plan.
I think Romans 8:29 shows what was God's plan, all along.