In the comics they made Iceman gay, Deadpool pansexual, Betsy & Rachel etc...
They also put Jean, Scott, Logan and Emma in a poly relationship with dialogue that makes no sense other than that Scott and Logan were sleeping with each other.
Why do you think they wouldn't have 'Wolverine and Morph hook up'? Morph doesn't identify as male or female, and can shapeshift into a girl, therefore according to current society Morph can be as much a girl as a guy. If they don't allow them to 'hook up' on the basis that Wolverine is straight, then the show is saying that even though identifying as a non binary Morph is really actually a man; which is not politically a stance they can take, or would take given both Marvel and Disney's current positions on those issues.
Also, if Wolverine isn't 100% cannon-confirmed to be sleeping with dudes right now, unless something changes with the current trajectory, he will be in the next few years.
It's a safe bet he will be having sex with Cable in the comics at some point.
Hell, given the rising popularity of consensual-incest in fiction post Game of Thrones, Cable and Rachel will probably be a couple at some point.
Who knew back when the Ultimate Universe had Wanda and Pietro in an incestuous relationship and revealed Woverine was likely their father and had watched them have sex that that was the future of where everything was headed.
Oh, brave new world...