Is it possible to extract data from the cells of a grid which is not getting identified as a table

It's a .Net application, and Object Spy has identified the control as being a ListView. A ListView can have custom views, similar to Explorer when changing the views to either small icons, tiles, list, details etc.

If you refer to https://support.smartbear.com/testcomplete/docs/app-testing/desktop/net/index.html and https://support.smartbear.com/testcomplete/docs/app-testing/desktop/wpf/index.html you will be able to get more properties for your .Net application.