Following the steps here , to get the Read/Access logs from Purview portal for Dataverse read logs, users need to enable Auditing settings for different entities one by one.

• Single record auditing. Log a record when opened.
• Multiple record auditing. Log all records displayed on an opened page.

Customer needs to set the audit settings in several different places to get logs flowing into Microsoft Purview Compliance portal properly. Ideally customers would be able to set the requirement for all entities to do read level logging at the environment level.