Kit Connor made his statement that he wished there were more bisexual characters in the films. So, this actor said that in fact there are quite a lot of bisexuals, but they are poorly represented on television.
Recall that Keith himself played a bisexual in Heartstopper. According to the plot, for some time he had to fight and deal with his feelings, in order to finally come to the realization that he actually fell in love with a guy. And for the character it was very unusual, because before he only liked girls. And as the 18-year-old male celebrity himself noted, this was a great experience for him.
In addition, this role also stimulated Kit to publicly declare his sexual orientation and admit that he is bi.