Yeah it looks to me like the trill symbols aren’t mapped yet unfortunately. Hopefully they can address this.
The general issue is likely to do with the fact that in Cubase historically, symbols are all one type of thing and in one big list, but Dorico doesn’t have a single “symbols” list. Instead, the types of objects that you find in the symbols panel in Cubase are split up into different types. Things like staccato dots and accents and tenutos are under “articulations” in Dorico, while things like + for stopped (horns) are in playing techniques, and harmonics are their own special feature, and various kinds of tremolos are types of “repeats”, and trills are types of “ornaments”. So what is a single list in Cubase has to be mapped to completely different parts of the program on the Dorico side. That’s probably why not everything is there yet, they have to do it manually one by one.
) updated version 15.0.2? Thanks! 