Hi.
The same question was asked a while back. As far as I can tell, you’d need to specify the font for those paragraphs in the ebook’s stylesheet.
Pick one that is common to all (or most) readers. Else, you’d need to embed that font. Which is a tad complicated, costs for rights (tho some fonts are free), and can’t be done from within Scrivener.
You’ll need Sigil or the likes. (Sigil is a free to use opensource software.)
Btw, I can tell from your screenshot that there is more than just a different font going on in your example. Some block formatting; with the vertical line on the left side. (I don’t know how to do that.)
If the book has no DRM, have a look at its stylesheet using Sigil.
Here is the other thread, perhaps you’ll find a more satisfying answer in there: