Dimensions refer to spatial dimensions, we're not talking about the sci-fi concept of alternative dimensions (which would be alternative universes) but rather that in addition to height, width, and depth there might be something else called ular or iqos that affect the smallest bits of matter but won't affect stuff our size.
Say God exist.
Now what?
Do we stop verifying experimental results?
Do we stop peer-reviewing the work of other researchers?
Does it actually change any of the theories we have?
Nope, nope, and nope.
The existence, or non-existence, of God isn't relevant because our understanding of the universe doesn't need a supernatural beings. You don't need a God to make rain fall, or to cause chemical reactions, or to test new medicines, or to invent even smaller circuits, and so on.