Hello,
Thank you for getting in touch with us.
Some of the recent Yoast updates included changes to the content analysis. It is possible that your content is now being graded differently. You’ll find more about the changes introduced here: https://yoast.com/yoast-seo-10-0/ and here https://yoast.com/wordpress/plugins/seo/change-log-wordpress-seo/.
Additionally, if you mark a page or post as “cornerstone content,” the analysis becomes much more stringent, which could cause your score to go from green to orange.
If neither of these scenarios apply to you, please send us more information. If you can include screenshots, it would be very helpful.
Please also update Yoast to the latest version (12.0.1).
We look forward to hearing from you.