[Vuejs]-How do I create a component instance programmatically in vue 3?

The reason why it does not work is because your component has no real constructor or class. Therefore, you cannot create an instance of this component.

But there is a workaround for that.

const TooltipClass = Vue.extend(tooltip);
const tooltipInstance = new TooltipClass()

Vue.extend creates a subclass of the Vue constructor.

Hope this helps!