Funny, or strange, how the Tree of Life is there in Heaven/New Jerusalem, not to mention the weird concepts the description of it forms in the mind.
But I'm not sure what you are asking me, what are my thoughts on that.
One thought on it has to do with the concept of 'Allegory' or 'Symbolism' that people more and more seem to take to. Apparently their concept of 'literal' means that this all happened in our current 'way of things'. But I have noticed that we almost always see things backwards. One of my ways of thinking is that much of what people consider symbolic or allegorical, etc, is because they can't match what they read with their current temporal worldview, which they consider ontological reality.
Thus, to me, if what happens in Revelation or Daniel's prophecy, for example, is REAL, or literal, it is not according to this mode that we know of as reality, but as THE REAL, to which this is, according to Scripture, like a vapor. (Credit CS Lewis for giving my mind a working concept of this notion). So also, with the Eden story. We really don't know much. To us they apply perhaps allegorically, but present day existence is not the standard by which to interpret Scripture, even though we are stuck in it. In other words, a healthy skepticism of our thinking, particularly of our presuppositions, is in order.