PPP has issues with the Catholic Church, and said as much back when he was on Nick's show in 2020. Back when people, including PPP, presumed Nick was a genuine Catholic.
However, something like that is almost quaint to talk about now. Nick's Easter stream wasn't about relatively minor details that varry among different Christian sects. We're at the point where he's mocking important fundamental concepts that are intrinsic to Christianity as a whole.
Like, he didn't say that Jesus died on on "torture stake," instead of a cross, as Jehova's Witnesses (a "reformist" sect) believe. Instead, he said things like Jesus was meant to rule as a mortal King, and him dying for man's sins was never part of the plan.
That's not congruent with any form of Christianity. Previous to this, he had also said Jesus was "just a man."
My point here is I think anyone who is a Christian... any type of Christian... would have pretty big issue with what Nick said.
We have freedom of religion in America, and Nick is free to believe whatever he wants, but it's pretty clear to me, based on his own words, he's not a Christian.