In this article, you'll see the demo content is a lot of "buy apples" and "make apple pie," but note that no to-do items exceed 18 characters which is the maximum length to fit nicely in that layout. So if you need to "buy turkey baster" (18c) you're OK, but if you need to "return turkey baster" (21c) you've overflowed the layout. Likewise, you can "call Alexander" (15c) but "send thank you card to alexander and elizabeth" (46c) is way over budget, and you'll need to mutilate it down to "ty card alex&beth" (18c) to fit. This leads, in the example, to shortening items to something like "shopping trip," at which point too much context is lost (what if you have a second shopping trip?).
Likewise, if you want to dump all the todos you can think of for the week and it's 20 or 30 small items, it's not clear that would work well in these layouts.
This is not to malign this system which I think is really cool, but to suggest that it's more useful to see real and more varied content in a system like this to see how it "really looks" rather than exclusively made-to-measure content of 1-6 super-short items per list.
0: https://anjahome.com/summer-bullet-journal-ideas/#What_Is_a_...