Design UI interface similar to amazon connect but open source?

I wanted to build a system for customers to design their own flow of how the program behaves when their customers engage with our "enterprise application" we are building.

I wanted to make the UI Designer interfaces very easy to use and I'm looking for an open source/free version of something similar to this:

(**note this is not a phone application but the flow of actions is similar)

Features:

• drag and drop
• add components
• connect components
• configure components
• different components types or basic sets of them.
• [bonus]Not sure about this, but a plus if it converts to yaml/toml or directly to code behind the scene.
• [bonus]Allows for export/import.

A picture is worth a thousand words: Picture source.

The only out of the box system I can think of that is similar is blockpy or blocky

Thanks!

Instead of designing the system from scratch, I'm hoping there is something out there to build upon.