Inquiry on Identifying Recent Dashboard Users

We have multiple dashboards and are considering merging them. To proceed, we’d like to identify the users who have logged into these dashboards recently. Is there a report or feature available that shows the users’ email addresses who accessed the dashboards? This would help us send out communication and follow up with them directly.

In Looker Studio, I think the report usage dashboards are anonymized, unfortunately.

In Looker, this should certainly be possible using System Activity!