Hello, @DigitalTrustBuilders,
Thanks for writing to us.
WordPress site healths score is commonly measured on the basis of site performance and security etc. To improve the WordPress site health score, please have a look at this article to learn more about how to improve the site health score.
For your 2nd issue. It seems like there might be a file permission issue. To fix the permissions problem you’re having, you can click here to follow the official WordPress Support guide instructions.
You check this article for the reference as well.
Thanks