Hello,
Thank you for getting in touch.
We are sorry about the trouble you are facing. Please follow this tutorial on how to mass update your posts: https://wordpress.stackexchange.com/questions/294575/how-to-force-update-all-posts-after-import
With that said, it is always a good idea to manually edit your key posts and see what the recommendations are that the plugin gives you and work on that. It is no good just seeing the score unless you know where your posts are lacking.
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.