JavaScript API and Python API are using the same server side Restful interface. So they behave the same.
To solving your problem, there are two ways:
We can add the missing API to get the linked rows in the JavaScript SDK in this month.
You can add this API call in your code directly if urgent.
JavaScript SDK is not used as often as Python SDK. So it is not as mature as the Python SDK. We will add the missing content in the manual.
This cannot be turn off. It is designed to protest the server. It is likely to have one record linking to thousand of records (imaging you have a product table linked with an order table). So pagination is needed when returning the linked records.
We will develop around manually, but I suggest to update the JS Client anyway.
I understand the Idea of protecting the server, if one has thousands of linked rows. If so, a property could tell this.
But honestly, one call to “ListRows” can already have so large data, a linkColumn with lets say 100 connected rows (the Linked-Items are so tiny (they just provide “row_id” and “displayName”)) should not really spam the servers additionally.