Simply do a Do a search to get all of your product and on it use format_as_text this will give you a box with two inputs one is for each thing and the other is for delimeter.

inside the thing put your product id as below:

{
“displayId”: this product _id
}

and on delimeter put a comma ,

Note: Your are sending a list of id as object. so wrap your entire Do a seacrh: Format as text with [] like below

[Do a seacrh: Format as text]

this is what it look like on the parameter you sending it will be a list of text and each text is exacly an object wiht one parameter as displayID with a ID