Hello,
It is good for us that you shared the resuts of your work and it’s really good that you found the correct plugin for that and add your code in the correct places.
About checking google fonts on your web-site we can tell you that they were added lately on it and could be cached because if to check it right now then there are only one google font on your web-site -> https://prnt.sc/PZtL7iG10aLJ which comes from one of your plugins -> Ultimate GDPR & CCPA but you should check it.
Regards