I would regard anything other than tiny amounts of boilerplate to be a code smell in most languages.

Code generation has so many downsides and Python is so dynamic I can't think what you're doing that couldn't be done better without code generation.

Weird, typically you can use metaclasses or mixins to remove such boilerplate.

I utilize that too but why not generate new models with forms, cbvs, drf endpoints, serializers, etc? You can pick and choose what you need, add the mixins and move on. Plus initial project using cookicutter to generate the original project in a much more fitting and featureful structure.