Hello @eddievet
Thank you for contacting the support.
1. Yes, we do not collect any data when someone connects to the app present in the plugin. If you want, you can disconnect and disable the module. That app is needed for collecting the data from your Google Search Console account and showing the stats in WordPress. All the data gets passed directly from Google to your servers. We cannot intervene or have access to it.
2. You need to enter the keywords manually in the plugin so it can analyze the content. You can follow the following guide to reach 100 score in the Rank Math plugin:
https://rankmath.com/kb/score-100-in-tests/
But please stay advised that these tests are just guidelines and one does not need to follow them religiously.
At the end of the day, the content needs to be written for the readers and not for the search engines.
Scoring higher points in Rank Math’s tests won’t guarantee higher rankings.
3. Thank you for your suggestions. We have plans on introducing a way to determine which text is longer in an article.
Hope that helps. If you have any further questions, please let us know. We are here to help.