Hi @ArijitDas, welcome to the community! 
Adola currently doesnāt support creating multiple records from a JSON array with custom Actions.
The good news is that there is a workaround with external collections, once you have succefully set up your Url endpoint you can āfilterā your list by parsing parameters.
Itās no perfect and in some use cases this canāt be emplemented, but until the devs find a solution thatās all we have 