Just wondering if you'd know.

I wanted to inquire specifically about something I found in the "Tectonic" datapack. In mapping random seeds Mushroom Hills biomes seem to be significantly more common. I'm positive it's beyond just coincidence. I know of course it's kind of strange to ask about just a specific datapack on here, but I was wondering why the reason might be and how I might be able to change it because it is mentioned nowhere in any download pages