Just found out how. The object must have a tween behavior attached.
// get object by its name
const obj = runtimeScene.getObjects(objectName)[0];
// get attached tween behavior
let tween = obj.getBehavior("Tween");
// create a tween identifier using the object name
const tweenYName = obj.name + "PositionYTween";
// run the tween
tween.addObjectPositionYTween(tweenYName, 2000, "linear", 1000, false);
To check how to call tween functions, see this documentation page.