Is there any on-screen relevance or evidence that Good Omens is narrated by God?

I was pointed to a piece that identifies the narrator as God on screen. In the introductory exposition, she says:

This proves two things: Firstly, that God does not play dice with the universe. I play an ineffable game of my own devising.

(Except for the marked pronouns, this is identical to the respective passage in the book.)

As for the relevance, it is noteworthy that the narration uses the present tense (for the time of the main events). I interpret this as God being well aware of the end of the world not going according to the Great Plan and being fine with that, as she does not intervene. Her own ineffable plan may differ after all.

An off-screen reason may be to directly avoid certain kind of viewers. In the audio commentary on the scenes in the Garden of Eden (a few minutes later), Neil Gaiman says:

I like the idea that, if you are the kind of person who is gonna be offended by a non-white Adam and Eve, you can stop watching right now.

Identifying God as female has a similar effect and the above was a way to establish this very early and less bluntly than with just choosing a pronoun. And indeed, God being female was one of the arguments of a petition trying to make Netflix (sic) to cancel the series by Christian fundamentalists.