Some features that may or may not be visible to you:
Monetization Tab: You'll only see some features specific to Ad Breaks if you're an admin of Pages already using this tool. (If you're not already using this tool, you can still check your monetization eligibility status and onboard eligible Pages.)
Rights Manager Tab: Rights Manager features will only be visible if you're already approved for Rights Manager. If you're not, you'll see an option to apply.
Instagram in Creator Studio
You need to have one of the following types of Instagram accounts to access Instagram in Creator Studio: