Google's first version of material design supports the use of bold colors and images to create a happy experience, but the second version has been reduced to a white solution, with a possible focus on minimalism, which is acceptable on desktops and even laptops. Mobile users, by contrast, feel pain.
As users become more aware that dark mode can help them save battery consumption, Google has ironically introduced a completely opposite design language. When users started shouting for black themes in their applications, Google dropped a bucket of white paint on their applications. And ironically, using Google materials to design version 2 apps does not even respect Android 10's system-wide dark or night mode settings.
Google does promise to bring dark mode options to its apps, and to its credit, it has slowly done so. Some apps such as calendars and notes do gain the ability to switch topics, but until now, Google's next most commonly used app has followed. A few users announced on the reddit forum that they had enabled dark themes in the Android version of Gmail.