This is a request to fix the bug from this discussion. If I could use a non-graphite font for that location, it would solve my problem (our default font is graphite only).
I’ve verified that the style ui.button.chapter-number does control the chapter selector. For example, if I change the color in that style, the color will show up on my phone.
However, if I change that font-family for the ui.button.chapter-number, nothing happens.