No, the valid path is without a blog slug (wp-blog-1):
/Users/username/Sites/wp/wp-content/themes/theme-name/assets/stylesheets/dist/app.css
And in HTML (<link href=…) the path to file is this:
https://wp-site.com/wp-blog-1/wp-content/themes/theme-name/assets/stylesheets/dist/app.css
