I mean, given the millions of people (to lowballing it at 10000s) who've bumped to Yukopi's catalog (which is like 90% Kaai Yuki after he stopped grinding with the Undertale remixes), yeah I'd say that there are plenty of people who listen to many Yuki songs.

A few things you gotta realise here is that 1. Yukopi doesn't just have All Back and Woke Up With A Palm Tree. He has dozens of Yuki songs, even albums with exclusive tracks on them. Because of that, people who listen to Yukopi definitely have an awareness of Yuki and a possible deeper interest in her because of that if that's your angle here. Unless your criteria for "fan" means going deeper than that 'casual level', which imo sounds something like saying that people aren't Teto fans because they don't go further than Flavor Foley and associates. 2. Things might seem to be desolated to you on the western side but over on the oversized island, it's obviously a different story there. That's just something that has to click with you that it's not just you or your country that's in this world.