My pen pressure is not working in Animate on my new Samsung galaxy book flex. The pen pressure and tilt buttons aren't there even though i am using a pen device. I know they can only be seen on specific tools such as the brush tool, and I know they don't show up if you are using a mouse. I am using the built in pen on the device and I can't find any information regarding fixing this issue for the Samsung galaxy book flex, I only see fixes for Wacom or Surface products. The pen pressure is working just fine in Photoshop.
If you have Animate 2020 or Animate 2021, go to the Drawing Preferences tab in Preferences... and try Windows Ink first, then WinTab. I don't know which API the Galaxy Book uses. At one point Samsung were using Wacom tech, but not sure now.
Restart after changing Tablet Input.
Try the brush on a new file.