[Autocomplete] Pass route parameter to autocomplete controller

[wouter-vs]

I have a autocomplete field type that is used in the same form multiple times using a CollectionType.
The fields are dynamically added with a Event Listener.

Each fields function is the same but the data they are fetching should be depended on an id.
I'm trying to make the route (to a custom controller that gets data from Elastic) dynamic by passing a parameter to the controller.
This way the same route/controller can be used for every field in the form.

But I can't figure out how to do this.

I tried creating a js controller to manipulate the url that is called, but I can't find where I can do this.

How can this be done?