
Hi @BirhanAydin,
Could you share more details on your scenario?
Do you want to create a new sheet in Excel file using Flow? I am afraid that it is not possible currently. We could use flow to insert rows to an existing table but not create a new spreadsheet. If you need this feature, please submit a request on Flow Ideas Forum:
https://powerusers.microsoft.com/t5/Flow-Ideas/idb-p/FlowIdeas
To export from PowerApps to Excel table, you should create an app based on table, then submit data from PowerApps to the table.
Please check the following doc on PowerApps for more details:
https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/get-started-create-from-blank
Best regards,
Mabel Mao