So before we get to the “actual” question let me just make sure everyone is on the same page with the cards in question
Zimone, All Questioning has an effect that says
“At the beginning of your end step, if a land entered the battlefield under your control
this turn and you control a prime number of lands, create Primo, the
Indivisible, a legendary 0/0 green and blue Fractal creature token,
then put that many +1/+1 counters on it. (2, 3, 5, 7, 11, 13, 17, 19,
23, 29, and 31 are prime numbers.)”
Cards like Garruk’s Uprising have an effect that says
Whenever a creature you control with power 4 or greater enters, draw a card.
Does Garruk’s Uprising (and other cards like it) see Primo when it is first created as a 0/0 or do they only see it after the +1/+1 counters are added to it?