pdf not showing some unicode correctly

[Lightup1]

Example:

---
title: error showing unicode
author: Lightup
date: \today
format:
  pdf: 
    include-in-header: 
      text: |
        \usepackage[utf8x]{inputenc}
jupyter: julia-1.8
---
ħ is showing,but ω is not showing.
Also for code cell

[dragonstyle]

I think that the issue can often be the the font used to render the PDF doesn't support some unicode characters. If this is the issue - this comment seems likely to be helpful:

#1559 (comment)

HTH!

[Lightup1]

Thanks, the issue is truely caused by the font specification.
I just fix that follow that comment.