there is no ready functionality, which could do that, but there are few ways how you could achieve it.
1. Using global cyclic action with start a subworkflow action -> https://docs.webcon.com/docs/2023R3/Studio/Action/Workflow/StartManyWorkFlows/
This way you need to have source data in an SQL table, and store some kind of identifier, to check if specific row already have been created in Webcon.
List items are populated using actions on register paths.
2. Using REST API and powershell -> https://developer.webcon.com/docs/rest-api/
This way there is no need to create additional actions on Webcon side, you can specify all the data in request, but it still might require some additional paths.
No need to have origin data in sql, it could be an excel, csv, or even another rest api.
I wrote some time ago a series on that topic, you could read more here -> https://blog.lumenn.pl/importing-data-to-webcon-1/