Hey folks!
So it looks like you’ve spotted that we’ve started testing dark mode in the android app… 
Just wanted to drop by and say that it’s still in the early stages but is something that lots of us would like to see released at some point, and we are (gradually) making progress!
As well as working on “banking features”, we’ve been making changes to our design system so that as we do build new features, they will work well regardless of the theme you’re on. However we’re still pretty early on the process, and as some of you have mentioned it’s sadly not just a case of “switching it on”. For context, our apps have been evolving over the course of 4+ years now – long before dark mode was even a thing – and there are hundreds of screens/icons/bits of text in the app that we need to update and test to make sure that we are confident that things will look good no matter what theme you have selected, and more crucially don’t break your banking experience.
I’ve recently made it a bit more widely available internally in an effort to identify the problem areas of the app and get those fixed and working in dark mode. But basically it’s not a trivial change and hopefully we’ll be making quicker progress soon so thanks for your patience! 