Buttongrid Android App 4 column limit

Jus a quick question: Ist it possible to display more than 4 columns with the Buttongrid in one sitemap in the Android App?

I have a Buttongrid with 6 columns and I can only see the first 4 when I hold the smartphone in vertical, but I can see all of them when i hold it in horizontal.

Why isn’t it possible?. Maybe the 6 are too much, but I think there’s enough space for 5.