I’m sorry.
It seems the question was poorly worded.
like the page below
xstore-child/functions.php
Is it possible to add Google Fonts by adding add_filter to ?
https://duellingpixels.com/blog/wordpress-websites/google-fonts-kirki-customizer/
https://boostifythemes.com/docs/general/how-to-add-custom-font-kirki/