From sona pona, the Toki Pona wiki

is also sometimes used with the broader, alternative meaning of transgender. This is contentious as some non-binary people do not identify with the trans label, and they and binary trans people may not want their specific experiences to be conflated. Due to the core definition of tonsi, describing binary trans people as meli tonsi or mije tonsi might be construed to imply that they are not fully women or men, especially as there is no coordinate term to specify cisgender meli and mije.