Power automate flow creation between two different application

Hi Nilofer_khan 

From my research, Power Automate is not able to export reports directly from other environments and publish them to your own Service. You may need to use the REST API to export reports first and then import them.

Reports - Export Report - REST API (Power BI Power BI REST APIs) | Microsoft Learn

Imports - Post Import In Group - REST API (Power BI Power BI REST APIs) | Microsoft Learn

use-power-automate-http-connector-to-publish-pbix-file-using-the-power-bi-api 

Furthermore, you might consider enabling "In-place semantic model sharing" in the vendor environment, which enables you to access reports from the vendor environment in your own tenant, with the option to save as a pbix file.

Please refer to the following links to learn more:

Power BI in-place semantic model sharing with guest users in external organizations (preview) - Power BI | Microsoft Learn

Use Power BI in-place semantic model sharing (preview) to share semantic models with external users - data provider - Power BI | Microsoft Learn

Access shared semantic models in Power BI as a guest user from an external organization (preview) - Power BI | Microsoft Learn

Best Regards,
Jarvis Tang
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thank you .. it helped understand lot of technicalities