You really haven't proven how it conflicts with anything. Your only example was to say it was never mentioned within a statement
This is a blatant misrepresentation of the discussion. There are many serious conflicts that I brought up, and you didn't manage to address a single one, you resorted to simply repeating yourself.
These are the main conflicts:
1. The sentence structure of many of the 52 universe scans leave no room for extra universes. Someone saying "the multiverse is made up of 52 universes" does not allow for this willful insertion of "known." Likewise for Perpetua saying "this multiverse has 52 universes."
2. Perpetua's goals and methodology fall apart in consideration of your interpretation. BWL tracked her progress by the 52 universes in the multiverse, if there were infinite universes the reality would be that she was making no progress whatsoever. This makes your interpretation incoherent.
3. If there are indeed infinite universes, why is it that they were never mentioned anywhere in this storyline? Did it escape the notice of every cosmic being involved?
4. If there are infinite universes, why would the return to an infinite multiverse at the end of the event have any significance? That would just be business as usual, yet it was clearly presented as a definite change from the former arrangement (52 universes only), which makes your interpretation, again, incoherent.
Why would we assume she doesn't know them?
This isn't answering the question.
She said "this perversion of my multiverse has 52 universes, now it has 51." This line makes no sense if the true number is infinity, and Perpetua is aware of all of them. The statement becomes nonsensical.
This isn't answering the question. Likewise, her goals as she explains them are explicitly centered around wiping out all life in the multiverse and recreating it. This, again, becomes incoherent if there are truly infinity and she only destroys 52 of them.
3) Why would it have to be mentioned again to be substantiated if it was already mentioned in the past?
This isn't answering the question. The mention in the past was in a different storyline by a different author, before Perpetua was even written in DC. So if there are truly infinite universes, why was it never mentioned again?
4) Fiction logic I guess.
This is functionally the same as saying "it makes no sense and I have no explanation."
Therefore, you admit that your interpretation doesn't fit within the context of Perpetua's goals and abilities.
Belief shapes the Gods but The Sphere itself can exist without Gods. As it literally predates the inhabitants within it anyway.
The Sphere always had an inhabitant, Hecate, the Collective Unconscious which depends on the belief of mortals for her power. Likewise, even if we assume that the Sphere can exist without mortals, theres no evidence that destroying an empty Sphere of the Gods would be more difficult than destroying a universe.
Also once again, we're directly shown that the DC Multiverse contained more than just six spared universes during this time. The Sphere of Gods, Bleed space, etc all still existed.
There's no evidence any of those things qualitatively change the challenge of destroying the multiverse beyond the remaining six universes.