Genshin Impact
Hoyoverse is unifying its game launchers
If you play or plan to play more than one HoYoverse game, you won't need multiple launchers soon.
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HoYoverse has announced that they will be updating their game launchers so that players can get easier access to other HoYoverse games, making it easier for those who play two or more of their games.
The update will be gradual; some might get it in Genshin Impact's Launcher, and others might get it on the Honkai Launchers until, eventually, all players get it. Starting on May 22nd, some players will be given the option to update their game launcher to the HoYoPlay Launcher, replacing their current Launcher and shortcuts; if you wish to keep using the old Launcher, you still can, but you'll have to look for it in your PC's files.
The HoYoPlay Launcher will include all PC HoYoverse games, namely Genshin Impact, Honkai Impact 3rd, Honkai: Star Rail, and Zenless Zone Zero when it releases, so if you play more than one of these games, you don't have to waste resources in multiple launchers, and if you play only one game, you won't need to download a separate launcher if you ever get interested in one of the other games.
If you get the update but only one game is displayed as installed, it might be for a couple of reasons. First, not all HoYoverse games will immediately become available in the HoYoPlay launcher. Second, if the game is available and Installed, you can make the Launcher scan for it in the "Find Games" option below the download button; unfortunately, it won't work if you installed the game through a different launcher, like the Epic Games Store.
From the information provided on their announcement and their F.A.Q, it seems that even if you update to the HoYoPlay launcher, you will still have the old launchers and can still use them for the foreseeable future, so to avoid wasting resources, you should uninstall any launcher you don't plan to use, make sure to leave the "Delete game resources" option unchecked if you plan to keep playing the game.