I don’t know: title pages, editorial notes or special instructions, contents, etc are pretty common. However, if you just want pages of text and find a DTP app better for your needs, then you might want to create PDF pages from the DTP app for the frontmatter, and then combine that with PDF pages from Dorico. You can do this in MacOS’s Preview.
Personally, I find Dorico’s handling of text and fonts a breadth of fresh air from … other music apps, and have no trouble with Bold styles in Headers or titles (if you use the Paragraph Styles).