Trans rights are human rights and it takes almost zero effort to simply use someone’s preferred pronouns, even if you don’t understand the reason for it.

From https://www.hrc.org/resources/understanding-neopronouns

Why is it important to refer to someone by the pronouns they use?

You should always use someone’s correct pronouns, even when they are not around, unless they specifically request that you not do so for reasons such as safety or privacy. When someone chooses to use neopronouns, they are expressing their authentic selves, and deserve our respect. The experience of being misgendered – having someone use the incorrect pronouns to refer to you – can be uncomfortable and hurtful. The experience of accidentally misgendering someone can be difficult for both parties. Neopronouns are a wonderful expression of our society’s diversity and using the correct pronouns for someone is a great way to show your allyship.

Some people may also use multiple sets of pronouns (ex. she/they, he/she, they/fae) at all times or in certain situations. Those who use multiple sets of pronouns often feel it is necessary to express different aspects of their gender identity. When you meet someone who uses multiple pronoun sets, you may kindly ask their preferences for when and how to use each of their pronouns.