Hey @Hugo_Monteiro, welcome to the Community!
This native row nesting is not possible yet. But you could simulate something like this creatively, e.g. with some formulaic bullets like here:

The formula for the bullets is like this:
If(
thisRow.[Level of nesting] > 0,
Concatenate(" ", Repeat(" ", thisRow.[Level of nesting] - 1), "⤷ ◼"),
"◼"
)
and I’m calculating the level of nesting and sorting pretty much like here:
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