You can add three chart types directly to the canvas app: "pie", "column", and "line". These are the built-in chart types for canvas apps that you can insert from the Charts menu on the Insert tab. You can use these charts to show data in a line, pie, or bar chart in canvas apps.
If you want to access additional chart types, such as funnel, radar, scatter, candlestick, and gantt charts, you can use the Canviz Power Apps Chart Components. This is an open source component that you can download and import into your app. It offers a range of nine chart types that you can configure with your data.