The funding widget, AKA buy me a coffee widget, gives the readers a way to support a creator.
The repository widget shows the commit information about current page, it’s useful for users to view or edit the source code.
The author widget is located in the sidebar, in order to introduce yourself briefly.
The reward widget, AKA buy me a coffee widget, gives the readers a way to support a creator through the use of donations or tips.
However, it limited to the QR code image, please take a look at the funding widget.
Disqus, Utterances and Giscus comments widgets are supported out of box. This article shows how to configure them and even customize your own comment widgets.