Hi @Sihem Ben hamed ,
Welcome to the Atlassian Community!
Next-Gen projects are still under development and, as you can read in the below pages only a subset of the reports available for Classic project are currently available for Next-Gen:
Classic Next-Gen Reports
- Sprint report
And dozens more - see the full list.
- Cumulative flow diagram
- Sprint burndown
More coming soon
This is because the reports shown in your screenshot (the ones under the "Forecast & management" voice in English) are actually depending on Time Tracking and Time Estimation and, as you can see in the Public Roadmap for Jira Software Next-Gen, while Time Tracking has already been shipped, Time Estimation is still in the work and it is expected to be released in 2020.
For further details or for updates on this, you may want to vote and watch the below Feature Requests so that you will get notified by email in case of any progress:
I hope this helps.
Jira is a powerful tool that helps teams to plan, manage, and report on their work. We love using Jira, especially for its ability to track issue progress. But how to monitor the...
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