Microsoft releases Launcher Preview, a pre-release version of the Microsoft Launcher
Microsoft Launcher Preview has been built on a new codebase so as to enable the testing of new features such as landscape mode and a revamped dark theme without affecting users on the more stable versions. As such, it will not contain all capabilities offered through the primary Launcher app, but will instead focus on feedback gained from the usage of a variety of different features. An in-built feedback button serves to fulfill this purpose.
For now, these are the primary capabilities on offer:
Give your phone a new look
Personalize your apps with custom icon packs, and use adaptive icons to give your phone a consistent look and feel.
Enjoy Bing daily images as your wallpaper, or use your own photos.
Microsoft Launcher supports Dark theme for your viewing pleasure. Select dark theme for comfort of use at night or in low light environments. This feature is compatible with Android phone’s dark mode settings.
Microsoft Launcher supports horizontal orientation to enhance your viewing preference.
I just installed it on my phone, Android 9. i previously had Microsoft Launcher beta so I installed it on top of that, i had to choose the new one as default launcher, obviously the Beta and Preview don't work together at the same time because they are separate apps. so i ended up uninstalling the Beta and now I keep using the new Preview which has built on new codes and supports more features.