It seems like this has been in the works for a long time?
From the post announcing the "New and Improved On Later" (emphasis added):
Client
On Later is finally in the app! As usual, it's in the tvOS/iOS version first, but it will come to Android soon.
(As usual, new features are delivered to Apple clients first, with Android following up with parity at a later date. The delay is because the code must be ported over; the Apple and Android clients do not share a unified codebase.)
Feature was introduced Aug 2021.
Its reasonable for comunity to ask if there is a delay, technical hurdle, or abandon idea.
Its also reasonable for devs to remain silent and ignore us.
Yes it will be coming to Android. We don't have an ETA yet.