PDF Expert
Readdle’s PDF Expert has also gotten the widget treatment, with an assortment that oddly also includes a music widget, since much like Readdle’s Documents, the PDF editing app actually does rather inscrutably include a built-in audio player.
The other widgets are a bit less surprising, however, with widgets that collect recent files and favourites joined by a Shortcuts widget that simply provides three buttons for quick access to recently-opened files, favourite files, or linking up to your computer. It’s also worth noting that PDF Expert has gained support for using Scribble in iPadOS 14 to fill out PDF forms as well.