Currently, user flow reports are only allowed as custom reports and cannot be integrated into dashboards. However, it would be great if scheduled reports (sent by e-mail) could contain both a dashboard and a custom report (with a user flow). This way, the scheduled report could combine the best of two worlds.
For me it would be fine if the dashboard and custom report were two separate pdfs in the email.
EDIT:
Just noticed that user flow custom reports cannot be sent as scheduled reports. So that is a feature request also 
. See also Custom report not appearing in scheduled reports