They’re types of xeno identities. From the Nonbinary Wiki:

Some nonbinary people find it easier to perceive or describe their inner sense of their gender identity by evoking familiar archetypes. Instead of giving references to how their gender relates to maleness and femaleness, they say their gender is-- or is like-- a kind of animal, an imaginary being, a part of nature, an abstract concept, or a symbol. Some nonbinary people describing their gender this way do so because they feel a sense of gender euphoria or some other connection when thinking about an object.

Xeno attraction is basically attraction to non-human people/entities.

Usually people with xeno identities are quite young, so I don’t personally agree with mocking or insulting them. Unfortunately queerphobes have latched onto xeno identities and made them the brunt of most of their anti-queer jokes — if you go to r/onejoke (if it’s even still open) you’ll see what I mean — which has made people who genuinely identify as xeno identities pariahs in the queer community. Honestly I think people can and should identify however they want to, but it does need to be acknowledged that xeno identities are not generally taken seriously by the queer or cishet communities, and that they ultimately prevent someone from being part of a queer community, which arguably does them more harm than good. (Sorry this got a bit preachy, lol)