vega-embed

If you want to embed the visualization part only, you can export a vega-lite/vega specification and then use Vega-Embed: https://github.com/vega/vega-embed or React-Vega to embed in your web app. At the graphic walker toolbar, active debug mode, there will appear a button on the top-right corner of the chart. Click it, and then you can export the chart spec. Or Embed the entire Graphic Walker as a react component: https://github.com/Kanaries/graphic-walker

I haven't seen anyone build these specific applications but I don't see anything in the way of building it. Notebooks can be shared just like any other Jupyter Notebook (charts become images unless are running the notebook). If you want something more polished, you can build a dashboard. Under the hood, Altair uses Vega-Lite so you can export your charts and embed them in a web dashboard with https://github.com/vega/vega-embed. To send charts, you can export them as images.