How to Harness Insights from Active WhatsApp and Facebook Communities for Content and Advocacy

Folks, good evening, I hope you are all well. I wanted to sense check something with you. I have recently been involved in supporting a community in both the strategic sense and operational. They have a very active, professional whatsapp community and facebook community which gets 100s of messages a day and week - they are looking to harness some of that insight to help create content but also for the community to drive product advocacy. Do any of you great folk have experience of building something that would be able to bring all that insight together and signal and filter key repeating messages. I have some thoughts, but thought I would reach out to the hive before I put pen to paper - any insights would be appreciated!