Connect Chatbot to Facebook and Instagram

I already built a working chatbot that runs on my client's website (python)
Now I need help connecting it to Facebook Messenger and Instagram DMs using the Meta Graph API, so the bot can automatically reply to messages.
The backend and webhook already exist — I just need help configuring the Meta Developer App, permissions, and page connections.
Tasks
During a short call we will:
Configure Meta Developer App
Enable Messenger and Instagram Messaging API
Connect client Facebook Page and Instagram Business account
Configure webhook for message events
Generate Page Access Token
Test sending and receiving messages
Requirements
Experience with:
Facebook Messenger API
Instagram Messaging AP
Previously connected Chatbots to Instagram and Facebook (it is written in python, so no n8n and similar things)
Meta Graph API
Webhooks and page access tokens
Goal
The chatbot should receive and reply to Facebook and Instagram messages automatically.
Time
Should take less than an hour.
Looking to do this ASAP (if you want to jump on the call right now it would be great).