Change the size of a quick chart on SharePoint online (modern)

Hi everyone, I'm building a SharePoint Online site for one of my clients, but I have an issue when it comes to the size of the graphs. I understand that it is not possible to change the size of these like that without further ado, but maybe some custom css code can solve this? As you can see on my attached picture, the graph now fills the large part of the page, I want to minimize this so it will be half as big so I can fit two on top of each other, is this possible?