Why is the design of the facebook mobile application not being updated?

Question

Android

I understand that this is not the worst problem, it just became corny interesting. Redmi Note 7 phone, global version, latest MIUI 10.3.6, Android 9. Facebook app version 231.0.0.39.113 is also the latest on Google Play. The redesign never appeared, the old design still remains even after the updates. Location Ukraine.
Actually the question is, is it possible to force it to activate in some way? Many in my region already have it, both on ios and on android. It is interesting to bypass the system until the way is clear

Answer 1

Carry out A/B testing or stage-by-stage rolling out of a feature.