Here's how I look at it.
It's simple, but I try to keep things organized in my head at a basic level before expanding.

Any time you put a marker (an A or B change) in the song, the preceding measure will get a drum fill at the end of it (or a 'lead in').

Whether it is two A's in a row or A/B changes or two (or three) B's in a row.
In my simple mind, this is how I can force/control a fill. Whether I call them chorus or prechorus or George, I control the drums/fills for a given section with this one simple rule.

There are also actual literal 'Markers' where you can label a section whatever you want, but the above is how I control the drums, which is what I think you were asking.

I do not work here, but the benefits are still awesome
Make your sound your own!