Fixing Markdown Ediror preview not working on IDEA on WSL2

 This sorted it for me - https://stackoverflow.com/questions/74523328/markdown-plugin-for-intellij-not-showing-preview

TL;DR;

add ide.browser.jcef.gpu.disable=true in Help | Edit Custom Properties and restart the IDE

possibly

ensure you are using an IDEA VM using

possibly

File > Invalidate Caches... > Check only Delete embedded browser engine cache and cookies > Invalidate and Restart

possibly 

sudo apt install libnss3-dev libgdk-pixbuf2.0-dev libgtk-3-dev libxss-dev 

sudo apt-get install libasound2 

restart