We're sorry about the trouble with the pen pressure in Photoshop. Please ensure that you are using the latest version (21.2.3) of Photoshop. Would you mind telling the macOS version you are working on?
I have followed the steps provided and it still doesn't work. The problme is that the brush works well in Photoshop 2017 and not as good in 2020, there is a huge difference in terms of how much the software is catching up on the pen strokes. It is very clearly slower and not as sensitive.