I've taken a look for you and you may find this support article a good one to read through - Special characters not exported to PDF.
The solution listed is below:
In order to solve the problem, a new font must be added to Confluence.
The best font to use would be a free Unicode font family that contains the special characters that are not being properly exported to PDF. As a suggestion, Google developed one that is free to be used and contains the currency characters that are not being properly exported in the example above:
Meanwhile, for the box-drawing characters, the font DejaVuSans below can be used:
After choosing the font, add it to Confluence using the steps from the KB article below:
I hope this helps but if you have any other questions just ask away 😃
All the best,
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