Customizing the portal

I was wandering if it was possible to customize the yunohost portal with “widgets” like clock, disk space, last login, etc… in a vertical or horizontal banner.

You can do that : Customize the appearance of the user portal | Yunohost Documentation

For example, you can use this theme : GitHub - eeeple/yunohost-Nord-theme: Yunohost portal theme inspired by the Nord palette

I’m not quite sure where to add the html code of the widget I want to see.
To be clear, I’m looking to get a custom html code inserted in the portal.
To add this clock for example