Starting with the release of Strategy ONE (March 2024), dossiers are also known as dashboards.
In a dossier HTML container, you can put an HTML script under HTML Text to display a customized page in a dossier. Sometimes, from the Strategy iOS Library Mobile app, you may notice that the font in the HTML container cannot display its style the same as a web browser.
For example, when using the Open Sans font in the HTML container, you see the following web view.

The below screenshot is a view from the iOS Library Mobile app.

You are experiencing this behavior because the “Open Sans” font is not supported on iOS, and for the HTML container, the fallback font logic is changed in WKWebView, which is provided by Apple.
It is highly suggested that you use iOS supported fonts, found here, to achieve the same appearance as designed.