I would like to bring in a new direction to look at things from.
First, Plato's analogy of the cave.
He referred to the shadows as the particulars, the objects casting the shadows as the real world/true world, and the sun/flame as the 'form of the good'. One thing I would like to mention is that another word for 'form' would be the 'idea' of something.
Now, I don't believe it has been brought up yet, but the stigma space is also referred to as 'the world of ideas', which would correspond to the 'real world' in Plato's analogy.
It also makes sense in lore, as the goal of Project stigma was to move humanity to the stigma space, however, in doing so, it would also cause humanity to lose its individuality, living on as one single consciousness. This aligns with Plato's theory of forms, as there can only be one perfect 'form' of 'humanity'.
Due to the above, I believe that the cave analogy does hold up quite well, especially since it later mentions that the goal of Project Stigma was to transfer the humans, who were compared to the shadows on the wall, to the real 'true world', the Stigma space.
To go even a bit further, the imaginary tree is said to be the origin of all laws and truth.
Since the tree is the origin of truth, it can be seen as the sun/flame in the cave analogy since another term for 'form' would be 'truth'. It also means that ???'s assumption that Kevin sees himself as the flame is more valid than previously assumed, since If I remember correctly, he had already taken a piece of the Finality authority which is at least equal to the tree in terms of 'rank'.
And finally, there's the game server analogy of the tree.
Of course, this analogy could be purely metaphorical, but if my argument about the tree representing 'the form of good' holds up, this would be incredibly strong evidence for R>F transcendence.
I am aware that Telomera did "debunk" this, so I want to address that beforehand.
They said that this does not prove any quantitative or qualitative superiority in relation to the universes/leaves. However, that is only the case if you ignore the various other statements about the imaginary tree such as:
The tree having infinite universe and futures
https://imgur.com/a/7sHNCWt
The size of the tree (since the original was comparing the amount of honkai in one world vs the tree) being infinite in the sense of the transfinite, which would be either Aleph-1, Aleph-ω (not absolute infinity, which is denoted Ω) or an inaccessible cardinal, depending on how you interpret it.
Another way to look at the size of the tree compared to the universes would be likening number of base universes in the tree to the amount of natural numbers/integers (Aleph-0), and the amount of all possible futures at all possible times of those worlds to the amount of real numbers (Aleph-1).
Any way you slice it, there is at least an uncoutably infinite amount of leaves on the tree.
As for qualitative superiority, while it is true that a game server might not see the data it has as fiction, the person accessing the server would (ie. Cocoon, Otto) and you wouldn't say that a person is more real than a server. Not being able to alter save files also isn't an anti feat, because you wouldn't be able to alter a save file in real life. You can go back to the last save point, but everything afterwards would be a new save file, not an altered version of the original. Even if you delete the original and replace it, it still wouldn't be altering the original.
So in short, yes, this is valid evidence for R>F transcendence, even if it is not enough on its own, which is also why I specified that this is only strong evidence only when you believe that the tree is akin to 'the form of good'.