Hi,
Thanks for sharing the site URL.
The “blog post carousel” option is coming from the Pace-builder plugin’s options.
Can you please confirm once if the following plugin options have been chosen from the settings:
Under “Blog Posts Carousel Settings” > “Typography Options” > Please choose “yes” for the option “Enabled” and then for the “Font family” option, please choose a setting other than “Inherit”.
If these are chosen correctly, then the settings applied here will be seen on the frontend, otherwise they may not be applied here.
Hope this helps.
Thanks.