Download Minecraft For Android 4.4.4

No. Worlds created in 1.16.201 can be upgraded to newer versions, but the opposite is impossible. If you switch to Android 10+ later, you can transfer your worlds via the games/com.mojang/minecraftWorlds folder.

Given that Android 4.4.4 is quite an older version, it's possible that the latest versions of Minecraft may not be compatible. You might need to look for an older version of Minecraft that explicitly supports KitKat. Download Minecraft For Android 4.4.4

Always download software and apps from trusted sources to minimize security risks. Download Minecraft For Android 4.4.4

If you bought Minecraft years ago on that Google account: Download Minecraft For Android 4.4.4

Yes, but only if they also use Minecraft 1.16.201. You can connect via Local Multiplayer (same Wi-Fi) or a custom server running version 1.16.201.