The problem is, there are like 50 topics complaining about the broken snow coverage in different areas, focusing on different parts of the world specifically, etc, so the bug votes are spread all over the place.
Link: Currently open topics discussing snow coverage problems
However, there are two topics that currently have quite a few votes:
https://forums.flightsimulator.com/t/will-snow-coverage-be-improved-some-day/552109
If all these votes across topics were added together it would definitely be a top user vote.
Apparently it came up in a dev stream and there was a promise from Jorg to get back to us on it “early next year (2023).”
Seb does say that Meteoblue has better data available, and that they’re in talks on hopefully adding it.