It is not enough to just overwrite the fonts.
First step is to cut the connection to Google / Adobe servers.
To do so you will have to set all fonts to system fonts like Arial and then set your custom fonts.
I explained it here already, for both 7.0 and 7.1
To demonstrate, I removed all Google/Adobe fonts from this website:
https://khaki-sapphire-m7jw.squarespace.com/
Passwort: 2022
There is no connection to Google or Adobe! See image attached.
Also to make sure a 7.0 site is GDPR (in Germany DSGVO) (more) complient you will need to remove the sharing buttons (even the like/heart button!)