I'll start with the one I founded: Anvil, which is an end-to-end Web dev system with Python (plus a drag-and-drop UI builder, and lots more good stuff): https://anvil.works

Here's our version of how to turn a Jupyter notebook into a web app: https://anvil.works/blog/jupyter-notebook-to-web-app

(tl;dr there's a library you can `pip install`. It makes a websocket connection to Anvil, and then your code - wherever it's running, including a Jupyter notebook - can do everything you can do in our serverless environment, such as handling requests from browser code.)

But of course, we are neither the first nor the last to think Python in the browser is a good idea. A colleague of mine did a survey and comparison of the major open source implementations (including PyIodide, which you mention, and Skulpt, which is what Anvil uses):

https://pythontips.com/2019/05/22/running-python-in-the-brow...