My confusion possibly stems from a knowledge gap with Graph APIs in general, but Facebook's dashboard, terminology, phrasing, and docs certainly aren't helping - I've Googled thoroughly and haven't got any closer to understanding what's required.
I've tried to break down the overall question as best as I can into parts with screenshots for reference.
This is what I see in my Facebook developer dashboard:

Question 1:
What are the numbers in the green rectangles?
Question 2:
What does it mean by "90-day changes"? 90 days from what point? Now or from October 29, 2019? Or something else altogether?
Question 3:
I've read this bit about a dozen times and it still doesn't make sense. There's no link to point me to anything here and the info icon next to "Change" is not clickable.
Use the Messenger Use Case from Business Use Case Rate Limit framework to replace the current rate limit on Messenger API. This change applies to all APIs listed under Messenger Use Case.
What's actually needed to be done here?
Question 4:
The bit in the red rectangle reads:
Add expired status for GET me/permissions, in addition to granted or declined.
Is this saying that FB have added this as part of their GET response or is it saying I need to add this in my request?
I clicked on the link for GET {user-id}/permissions and it takes me here: https://developers.facebook.com/docs/graph-api/reference/user/permissions/, where I see this:

Question 5:
This one's related to Question 4. 'Parameters' - are they request or response parameters?
NOTE: I've checked the code in my application and I'm not explicitly calling any of these endpoints. The closest thing I could spot is the following line that makes use of the react-native-fbsdk package:
LoginManager.logInWithReadPermissions(['public_profile', 'email'])
I'm guessing it's probably a simple case of upgrading this package, but the questions above still remain.