Pie charts can be a bit tricky in Penpot because you have to do the calculations for value = angle yourself. It’s not as simple as apps designed for presenting data where you just enter in the data and then the app does the work.
But it’s totally doable! I recently made a sales dashboard UI example that uses pie charts and has a few pie chart components (see below). You can download the template directly from this link or find it in the Libraries & Templates collection.