I recently made a serverless lambda/dynamo webapp following similar patterns and wrote about the experience here: https://johnscolaro.xyz/blog/serverless-python-websites

I think it's amazing the python community has like 5 half baked solutions to this problem, all of which are either abandoned, poorly monetized, or have a janky UI. I mean we have: Zappa, Chalice, Serverless, and if you attempt to do it yourself, do you use Cloudformation, CDK, or AWS SAM?

Following with interest, I think there is room for better tool in this space.