Does anyone have experience with Delve and Visio files, does Delve work well with Visio files and make the contents of the Visio file searchable/findable in an effective and useful manner?
Do you mean this?
https://support.office.com/en-us/article/what-is-office-delve-1315665a-c6af-4409-a28d-49f8916878ca
Yes!