Development Discussion Board

Is there a phpBB 4 demo some where for the curious?
I'm aware, that phpBB 4 is still in the development phase - just curious to see what it will look and feel like.

Edit 20211101:
I found a link to a demo here: https://codepen.io/hanakin/pen/jvvGLj?editors=1100
The link is: https://codepen.io ...

Is there a live demo board of phoBB4 somewhere, so we can see what will come?

I’m aware, that phpBB4 is still in development.
Just curious 🧐