From what I take away, Milo is using the ScrubSmall biome type, which is now the same size as the regular Scrub biome type.
As YouNameIt also said above. (Should have refreshed the page first!)
Another Biome related issue I found is that Scrub_Instead_Of_Trees got removed in 2024 and now defaults to what looks to be a scaled down version of the default vegetation in the area. It looks like in 2020 this Biome was the exact same as Scrub (same GUIDs), hence why it was likely removed, but because of that it’s now produces errors for all of those vegetation polys in 2024 and displays something not even close to what it was in 2020.
It would be nice if this could somehow fall back to just use Scrub for 2020 packages in 2024.
Luckily this is still easy enough to solve in the 2020 package as well. Just did a bulk search for Scrub_Instead_Of_Trees in the XML and replaced them all with Scrub. Will just require a 2020 package update to maintain forward compatibility.