New to this, need price targets for my first client

In a mix of circumstances I am taking over as talent manager for a pretty large creator are a falling out with their previous deadbeat manager that was causing them to lose deals and ruining relationships. This creator is pretty large and I think they may be severely underpricing themselves. I'd like some experiences opinions on how much this creator should be charging per video per platform and package prices, example for 1 video on instagram vs 3 or 5. Thanks all, I think this creator has been burned by bad managers and would really like to support them.

Follower counts:
Facebook 2.4M followers
TikTok 1.2M followers
Instagram 850K followers
YouTube 420K subscribers
Snapchat 175K followers

View counts per month:
TikTok: 10,000,000 to 15,000,000
YouTube: 15,000,000 to 20,000,000
Instagram: 80,000,000 to 90,000,000
Facebook: 150,000,000 to 200,000,000