https://doc.sitecore.com/xp/en/developers/hd/210/sitecore-he...
However as you can see, XM Cloud clearly favours JavaScript, specially in the components that replace content editor and page graphical editing,
https://doc.sitecore.com/xmc/en/developers/xm-cloud/sitecore...
And then check the acquisitions, https://doc.sitecore.com/