Can workers see participant feedback on the Manage Participant Feedback page?

Yes, they can. There are 2 configurations that determine this.

1. The Worker can view feedback before evaluations are complete option is enabled in the process flow for the document. If this isn't enabled, they'll only be able to see participant feedback in the performance document.
2. Both View Participant Roles and View Participant Names are set to Yes in the Processing by Role section for all sections in the performance template. If either are set to No in any section, workers can only access the participant feedback in the respective sections of the performance document where it's configured.