I actually had no idea other genres of music existed because rock/metal was all I was raised on.
Tbh that was me until 2020. Of course, I knew about other music genres and artists but I wasn't very interested in them. I didn't listen to modern Pop and Country music. Then came Covid, I couldn't get out and playing games got boring too. So what to do all night? I started searching for new bands at YouTube.
That was the beginning of a very exciting journey and at some point I found Dreamcatcher. K-Pop also changed my opinion about Pop music in general. I got much more interested in Metalcore too, especially in Metalcore bands with strong Pop influences in their sound (like Dayseeker).