I'm working on a system of data entry where a user enters their query in an input field, then can interact with the returned items on a grid that autopopulates based on that query, kind of like my simplified example below. Are there any existing applications that have functionality similar to this?
There are lot of apps using this pattern, for example shopping lists. In your solution I would change the position of [+] button to the left, because in your case eye has to wander from left to right and that kind of jumping is not friendly.
For example Listonic from Poland did it right, and looks like this: