IsEligibleForAgeFeatures behavior in Brazil

From the Feb 24 news, I understand that for all Apple users in Brazil with iOS26.2 and newer, isEligibleForAgeFeatures will eventually return true. Brazil is a "nonregulated region", and developers will need to handle all three situations of ask first/always share/never share.

Please correct me if I'm wrong above. A few questions follow on the eligibility check:

1. What's the return value of IsEligibleForAgeFeatures for a Brazilian user who has NOT touched the age range feature at all, thus hasn't picked one of the three options?
2. How can we test these cases? From the updated sandbox doc, there's more information on declined/approved, will those the same behaviors as a future Brazilian user? The doc used to say Texas, now it doesn't say any region.
3. On which date will Apple START to return true for IsEligibleForAgeFeatures for Brazilian users? I cannot find the exact date anywhere.
4. Will ALL of Brazil return true overnight, or is there some ramp up that developers need to be aware of?

Thanks a lot for sharing the guidance, and thanks in advance for more guidance to come!