I am looking for a way to Link Nintex form( which is a template to add monthly activities), and once that is filled out, it should be linked with Power BI to generate a graphical view of the list. Can we achieve this?
From your SharePoint list actions you have the option to export to Excel. Once in excel you can use Power BI to create you graphical view. Each month you only need to click refresh data in your excel spreadsheet and it will automatically update the graphs as you receive new content in your SharePoint list.