configure SECURE_PROXY_SSL_HEADER like in answer above https://stackoverflow.com/a/72685575/1611526

class BothHttpAndHttpsSchemaGenerator(OpenAPISchemaGenerator):
        def get_schema(self, request=None, public=False):
            schema = super().get_schema(request, public)
            if request.is_secure():
                schema.schemes = ['https']
            else:
                schema.schemes = ['http']
            return schema

then:

schema_view = get_schema_view(
    ...
    generator_class=BothHttpAndHttpsSchemaGenerator,
)

This configuration works for dev and production environments.