Hey Dennis!
First change the standard format to Times with all the adjustments you need for your paper. Second change the font in the edit format in the compiling window. You have to do that for all the level one to three texts.
Have a look through the project settings and change the fonts here as well.
The default font scrivener used was Helvetica. So it took me a bit to find all the standard settings to change.
After you’ve done this, you could save the settings and your custom compile format.
Hope this helps!
Wishing you smooth writing and lots of inspiration.