Is it possible to do bulk write by Looping through each table row?

Hey there @sunny! This is definitely doable. We have a tutorial in our docs that walks through how to do this with a CSV -- it should be able to get you to the finish line.
https://docs.retool.com/docs/scripting-retool#section-example-firing-an-api-request-for-each-row-in-a-csv