Neoreader Font Help

Hi!

I need some help setting the font for chapter titles.

I'm setting up my neoreader to use Bookerly as the default font on my Boox Go 10.3.

I've added the font family to the Font folder, the app appears to group the fonts as a single selection - with no way of selecting the styling as you can for system fonts. This means I can't select Bookerly Bold for chapter titles.

I'm a bit confused as on my Palma 2 I was able to select the font styling separately - although I've just checked my Palma again, and whilst "Bookerly Bold" is still selected for titles, there is not only one option of "Bookerly" if I try to change this.

Any help is appreciated