If you are asking as a partner, unfortunately, the customer community is not for supporting partners with configuration questions. You can post questions into the partner community here:https://groups.community.sap.com/t5/delivery-forums/ct-p/hcm-del...

This was posted in the  Human Experience Management Q&A, aka SAP SuccessFactors.  I suspect you intended to post this in a different SAP line of business forum.

There is no "front end" admin tool that allows you to update individual items in a performance review, including ratings or comments.    You can only upload overall Performance Ratings from Admin Tools.  This could be achieved using available API's, ...

This was accidentally entered into the "Question" area of the community.  I think you meant to reply to this posting...  https://groups.community.sap.com/t5/beginner-corner-blog-posts/digital-skills-initiative-applicant-g...

Was this intended for the "Human Experience Management Q&A," aka SAP SuccessFactors?   I suspect it was not.  You may want to repost in a different SAP LOB forum that covers FICO.