This feature is on the teams backlog. Thank you for your votes and comments.
An error occurred while saving the commentPRADEEP KUMAR commented
You've built a Report in the Desktop with multiple tabs.
When you upload (Publish) the file it will become a dataset and report in app.powerbi.com (The Service)
When you pin any visual, from any of the tabs in your report to a dashboard, after you share it - the end user will click the tile and be taken to the report page that you pinned the visual from. They will also have access to see the other tabs in your report.
You can connect multiple reports to the same dashboard, by pining visuals to the same dashboard.
You are correct, you can only share a dashboard with other users.
*Unless you want to build an Organizational Content Pack (more advanced, but you could share reports in this method).
Looking for more Power BI tips, tricks & tools? Check out https://mindmajix.com/power-bi-training