So I got interested in the grease pencil and tried to follow some tutorials on how to use it. Unfortunately is was laggy for me the whole time and would draw the line after I finished it or it would simplify my line when I lifted my pencil. I am using sidecar and a 2020 iPad Pro.
I found the issue to be related to the retina resolution of my MacBook Pro (16 inch, 2019). I have an app called RDM that allows me to choose different screen resolutions, as well as non "retina" versions of the screen resolutions. When I switch the resolution to a non retina version, the lag is completely gone and the grease pencil works great. It is blurry in non retina resolution though. Any suggestions on how to get around this issue? Thanks.