Can I modify the html of an Akaunting page?

Hello, yesterday I installed Piwik(Matomo) on my Akaunting profile through the apps menu. I configured the settings properly, but when I click on Apps->Piwik I don't see any user data. I see the data without problems on my Piwik main page. Do I need to implement the widget code ("With Matomo, you can export your Web Analytics reports on your blog, website, or intranet dashboard... in one click."), which is essentially an iframe and how can I do it?