How to Retain Font Weights when Exporting Word Doc to PDF?

I’m trying to imitated LateX style typesetting in word by using a this word template. The main issue is that when exporting as a PDF, some of the bolded text appears as regular (Computer Modern Family font is installed).

I think this might be due to predefined weight a certain font has but is there a workaround to export PDF as it is in Word. (Below are examples of what I get)

Word
PDF