Hello Jaden Salmon.
Welcome to Microsoft Community.
Regarding to your information I assume that you have some issues when you view the PDF through Edge.
Could you please clarify what you mean by "embed fonts"? Are you referring to inserting some text into a PDF file opened in Edge?
Or is it about adding annotations or something similar?
The function of inserting text in a PDF is typically found on the toolbar of a PDF viewer.
If possible, could you provide a complete screenshot?
If there is anything not clear, please do not hesitate to let me know.
Best Regards,
Tommy-MSFT | Microsoft Community Support Specialist