Repeat for comma separated string field values

I got a database field with image urls in it, separated by commas.
In appconnect I can bind these data with the following code:
get_product.data.query_product.product_images.split(',')[0]
get_product.data.query_product.product_images.split(',')[1]
etc…

Now I have created a table and set the table body a Repeat Children with the expression get_product.data.query_product.product_images:

I set the Image Source in the table cell to product_images, like this:

Unfortunately no images are shown in the table. Anyone an idea what I am doing wrong here?
The repeater is clearly not configured correctly, but I can’t figure out how to fix that.

Thanks for any help in advance.