Over the years, there have been multiple anime that have done exceptionally well globally despite being not as popular in Japan, and Solo Leveling may just be the latest addition to this list. Anime and manga have begun to acquire an even more diversified fan base in recent years. This shift is reflected in the various languages dubs and translations are readily available in as of late and the overall increased accessibility of anime and manga.
I see manhwa is following in manga's footsteps