How to distribute (insert) content nodes programmatically

Question

Is there a way to programmatically distribute (insert) content from lightDOM to ShadowDOM?

I would like to wrap every single child node into an element. For example :

Answer 1

There is quite old issue at W3C Bugzilla: #18429 - [Shadow]: Specify imperative API for node distribution

But as for now, there is nothing in spec about that.