The feature is going into internal clusters for testing. Should be available externally in PBI Report Builder within the week and in PBI clusters in 3. If issues come up, then those times can change.
It is already supported in Power BI Report Builder, and you should be able to publish to the service amd have it supported later this week or early next week.
paginated reports in Power BI is a Preview feature, and power bi product team keeps improving it.
Here are the data sources you can connect to for the initial release:
More data sources will be coming during the preview period.
It is just a Preview feature for now, and it should be included in the future,
For your requirement, you could post your idea in Power BI ideas and make this feature coming sooner.
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