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Last Tested: Apr 2, 2020
Short answer is yes, but there's not much about them.
LookML dashboards aren't stored entirely in the internal database, since they're defined in LookML (hence the name).
However, some data resulting from the use of LookML dashboards are stored in the internal database and this is viewable through system activity in the
history explore. Their dashboard ID will take the form
model_name::dashboard_name rather than an integer.
You can see LookML dashboard IDs show up in the
history explore through this extended URL example: