Unity: Positioning a UI Toolkit VisualElement relative to a GameObject

FloatingDamageText.cs

// the gameObject.transform.position for example, in my case a empty gameObject positioned over the character
Vector2 gameObjectToScreenPosition = Camera.main.WorldToScreenPoint(position); 
Vector2 screenToUIToolkitPosition = RuntimePanelUtils.ScreenToPanel(_root.panel, gameObjectToScreenPosition);

        Label combatText = new Label(text);
        // set the label's text
        combatText.text = text;
        // set the label's color
        combatText.style.color = color;
        // Absolute
        combatText.style.position = Position.Absolute;
        // combatText the label's position
        combatText.style.left = screenToUIToolkitPosition.x;
        combatText.style.bottom = screenToUIToolkitPosition.y;
        // add the label to the root
        _root.Add(combatText);