If it is clicked and you push a datagrid button, the selected element will be the parameter of you microflow. So you know which Entity is clicked. But you can not know which attribute is selected.
My bad, I should rephrase my question.
The datagrid columns contain attributes from different entities.
When a cell is clicked, it is the datagrid entity that is passed as argument to the microflow. Is it possible to know which of the other entities (linked cell) was clicked and what the value of that attribute?
I hope my question is a bit clearer
I think Data grid Extension widget may solve your problem, please check it.