@kartik10212@gmail.com I noticed the same thing on my device, I'll investigate why it's behaving this way.
In the meantime, here is a short-term fix:
Update MyASUS to the latest version on Google Play Store
Settings -> Accounts -> Add account -> MyASUS -> Log in to your ASUS account
Settings -> Support -> MyASUS -> Choose region if you haven't already -> Settings -> Add shortcut to home screen
MyASUS should now show up in your app drawer.