Hi Masha,
You can find such information in our
gray pages. You can list your Dashbords and Insights there and check their details(metadata). Endpoints looks like my examples below.
Dashboards:
https://<your_hostname>/gdc/md/<workspace_id>/query/analyticaldashboard
Insights:
https://<your_hostname>/gdc/md/<workspace_id>/query/visualizationwidgets
More information can be found
here.