My comment is in context of this project and not a generic statement. My startup is built entirely in python.
A boilerplate - by definition is a get started quickly tool for people that are (by choice or otherwise) not interested in going to the depths of a framework. In that very particular context, a Nextjs based boilerplate will beat this one.
As an example, let me share a nextjs template that you can buy for 20$ https://themeforest.net/item/react-material-bootstrap-4-admi...
https://themeforest.net/item/react-next-modern-landing-page-...
again, im not trying to crap over the OP's attempt. I seriously commend it. But if there's someone looking for a boilerplate to get something with a frontend/backend up and running quickly...i still do think doing it in one language/framework is much better.
P.S. And I do think TS is a fantastic language. But again, my point was not a purist Python vs TS/JS slugfest