[Aaargh20318]

I suspect that is largely due to the success of Apple Pay. Banks used to have their own apps on Android for years and only grudgingly started to support Apple Pay since they couldn't use their own apps. They only started migrating from their own apps to Google Wallet/Pay after Apple Pay became a success and Android users started to feel left out. They would never have supported Apple Pay if they hadn't been forced to do so. In fact, even though there was no alternative they kept dragging their feet and complaining about it for years.