Lando was pansexual in the original trilogy and I can prove it
Lawrence Kasdan has confirmed that Lando is pansexual. It's clear that he's open to different kind of relationships.
Some far-right nazi evil supremacist are against it. But it's clear that his pansexuality was established in the original Star Wars.
You don't believe it?, well I can prove it. You can check this sexually suggestive scene from the original Star Wars trilogy where you can perceive the desire Lando feels for his mate:
https://i.ytimg.com/vi/og9tIQtmxko/hqdefault.jpg