Angular Mat checkbox - pass selected rows to the backend logic

I'm using Angular material data tables and I'm able to use selected rows propreties for handling data in the frontend like export rows to csv format,
I have a node.js api that updates the current status of an item and i'm using this API in my angular service I'm able to modify the status for a single item from the details page ,
but I want to have the possibility to modify it for all the items after checking all the rows ,

Any idea on how that can be done