Yeah pretty much all of the games have it (and NepNoire) in them although the amount of the ship(s) present changes depending on the individual game in question.
A lot of comics are like that on Lezhin, a sudden abrupt and unresolved ending that had so much potential but ended on a short note. Sadly, this is all very common to most manhwas especially those on Lezhin and Webtoon.
...oh I get it. It's almost 4th of July. North America's Independence day. So this shipping is American because Clownpiece's costume is like the American flag. And star sapphire's name is star and the color blue which is also related to the US flag.