use apig-wsgi instead
translation from the aws api gateway v2.0 lambda event to wsgi
pip install api-gateway-v2-to-wsgi
import api_gateway_v2_to_wsgi
from ... import app
# app is your wsgi callable, such as the `Flask(...)` object from `flask`
lambda_handler = api_gateway_v2_to_wsgi.make_lambda_handler(app)
for a full sample, see testing/example
for more information on how I set up my lambda, see testing/example.md.
additionally, see the api gateway documentation (though it's not very good at the time of writing so glhf)
seems the lambda integration guide is slightly better