Starting with version 5.2.0 of the third party app SAML Single Sign On - Confluence SAML SSO OIDC + User Sync, User Profiles for Confluence can also synchronize data from user directories that are connected through this app.
When User Profiles for Confluence is installed, the attributes configured in User Profiles for Confluence can be mapped in User Sync connectors and SAML Just-in-Time Provisioning.
For more details, please follow the official tutorial provided by the vendor of SAML Single Sign On - Confluence SAML SSO OIDC + User Sync: