You’ve upgraded iOS and now you have those ugly memoji icons. Here’s how to get rid of them

You can do it in 10 seconds:

go to Settings > General > Keyboard, scroll down and tap the slider next to “Memoji Keyboard” to disable Memojis in all apps. This is much easier compared to disabling Memojis in earlier versions of iOS and iPadOS 13.

Via this: How to Hide Memojis in iOS 13 and iPadOS 13