While in the middle of using photoshop the pen pressure just stopped working. While it was open. While I was drawing. I reinstalled the drivers and still not working. Deleted photoshop preferences, still not working. System preferences show the tablet detecting pressure. Still works in Blender and Cinema 4D. It only doesn't work in photoshop. On a Mac, OS Catalina.
For some reason can't edit my post... wanted to add that the little ! warning triangle pops up next to the pen pressure settings, though I have uninstalled and reinstalled the driver, and it was working just fine before simply deciding not to.