Hi @Anonymous,
Do you want to pass all records within the Data table from your app to your flow?
I have made a test on my side, if you want to pass all records within the Data table from your app to your flow, I afraid that there is no way to achieve your needs in PowerApps currently. There is no way to select all records within the Data table control in PowerApps currently.
In addition, there is also no way to pass a Table/Records data from an app to a flow currently. Currently, Microsoft Flow only accepts Text string value as parameters passed from an app.
As an alternative solution, you could consider take a try to list your data using Gallery instead of Data table within your app. If you want to get all records displayed within the Gallery control, you could use the following formula:
Gallery1.AllItems /* <-- return a Table value */
In addition, if you want to pass all records (Table value) within the Gallery into your flow, you could consider take a try to concatenate all column values into a single one string with a specific separator (e.g. '#').
Please check and see if the following blog would help in your scenario:
https://www.techmikael.com/2017/05/saving-collection-of-images-from.html
Best regards,
Kris
