When launching a DocuSign signing session from a Salesforce Community site using Lightning Web Components, the signing session initiates correctly as per the guidelines from the DocuSign site with reference of link - https://developers.docusign.com/docs/salesforce/how-to/embedded-sending-signing/. However, I am encountering an issue where the template with prefilled fields is not appearing. I have set up field mapping in the template, but the mappings do not show up on the signing page.

How can I achieve this using a Lightning Web Component (LWC) with Apex?