Version

3.1.4

Reproduction link

https://codesandbox.io/embed/romantic-curie-xnfgd?fontsize=14&hidenavigation=1&theme=dark

Steps to reproduce

instance.slots.test not work in setup at helloWorld.vue

What is expected?

instance.slots.test can render node

What is actually happening?

in vue2.X，I can use this.$slots.test, but VUE3 instance.slots.test not work

That's an internal API that you should not touch. Why would you even do that? just render the vnodes directly. You can i.e. use <component :is="vnodes here">