Emojis recently used

Hello everyone. I've had an iPad for some time now, but I've never really used emojis on it, maybe just one or two. However, I recently noticed that in the "recently used" tab, there are many emojis that I've never used in my life. These aren't completely random emojis but rather quite a few face emojis and things related to affection.

Is this a bug? Was I hacked? Or did Apple simply fill in the rest of the space, if that's even possible?

Thanks for the help!