A set of pronouns that gender-non conforming (non-binary, transgender, etc) people may use. The two pronouns may be used interchangeably, or they may have a preferred one.

In this case, they prefer the pronouns he/him but do not hate the pronouns they/them.

When someone goes to the gym and spends 90% of the time on their phones scrolling through social media

A group of gender pronouns, confirming a person or other types (non-binary, transgender, more); and meaning that the person likes to prefer the pronouns 'he/him', but does not mind all if 'they/them' is used. Either one can suffice!