Owning both Android and iOS devices, I understand the frustration. I’m sort of looking at a move to Android first and Monzo is a key app I need to be up to parity!
I hear regularly that the Android team are working to bring the most important features over to the Android app before the less useful ones. For example, search was just added to the beta channel along with some internal changes to notifications and a new limits page to match the iOS app. There’s also Android Pay for Monzo.me in the pipeline.
Android Pay on Monzo.me
As it stands today, the Android team are still rapidly catching up to the more than one year head start that the iOS team had, especially as Monzo start making moves to begin internally rolling out current accounts. I’m sure there would be riots in the community if current accounts didn’t roll out to the public on both platforms at the same time! 
Let the team know if there are specific features you feel should be bumped up the list though, they do listen!
Just try not to ignite platform wars with numbers like that. We’re working towards parity here. 