Hi @BJ94 ,
Could you tell me what type of file do you want to download?
Assuming it's csv file and I made a sample for you.
Create a list in SharePoint with the following contents:

Add a button to the canvas, and the button 'OnSelect' property is set as follows:

Set(var1,ShowColumns(Test1,"Title","first","last"));
Set(var2,JSON(var1,JSONFormat.IndentFour));
'PowerApp->Compose'.Run(var2)
Create a flow and get the value of the variable 'var2'.


After running, find the run history of the flow in PowerAutomate, copy the output.
Add a Parse JSON, copy the above output to Generate from Sample.

Add a 'Create CSV table'.

Add a 'Create file' with the file name as the table name. CSV. The file content is a CSV table.


Best Regards,
Wearsky