No, why should there be ? why should sexuality even be an issue in kids shows ?
And of course there are more boy likes girl relationships in cartoons since heterosexuals are the norm, but those relationships aren't really developed or anything, it's just some slight hints here and there, they're kids shows not adult movies.
As much as you might like it homosexuality isn't normal, it's fine and I have nothing against it but it's not normal and I can tell you that most if not all parents would not be happy if their kids would turn up gay, sure they might not say anything or even be fine with it eventually but most want their kid to have a normal family and have kids, having gay relationships in a kids show will enrage a lot of parents and if some of those kids turn out to be gay later on the parents will blame the cartoons even though they aren't at fault.
There's also no point to potentially loose a large amount of your viewers to cater to a small minority.
And of course there are more boy likes girl relationships in cartoons since heterosexuals are the norm, but those relationships aren't really developed or anything, it's just some slight hints here and there, they're kids shows not adult movies.
As much as you might like it homosexuality isn't normal, it's fine and I have nothing against it but it's not normal and I can tell you that most if not all parents would not be happy if their kids would turn up gay, sure they might not say anything or even be fine with it eventually but most want their kid to have a normal family and have kids, having gay relationships in a kids show will enrage a lot of parents and if some of those kids turn out to be gay later on the parents will blame the cartoons even though they aren't at fault.
There's also no point to potentially loose a large amount of your viewers to cater to a small minority.