to do this in blueprint you need to create an actor which will be the spawner and make a script like in the picture below. create a custom event then with it selected go to the details panel and check the box call in editor, this will allow you to run the script from the main level editor window ( drag the actor into the level, select it and in the details panel there will be a button for the event). the next part is as shown by Everynone, get data table names, for each loop, get datatable row, then just a spawn actor from class.
if you have multiple datatables then you may also want to promote the table pin to a public variable to make things easier for yourself and make this one actor reusable.
you will need to be careful to only press the event button once as you could end up spawning many of the same things and not realize it. also once youve spawned the actors like you want you can just delete the actor you created.
