How likely is it that someone can “mask” their psychotic symptoms in order to get discharged from involuntary inpatient care

My family member has recently been admitted to an Australian in patient psychiatric facility after suffering what appears to be an acute psychotic episode.

Is it possible for a psychotic person to “mask” their symptoms in order to be discharged? Like to refuse to admit that they have a mental illness but to have the insight to understand that talking about certain subjects will make them need to stay longer?

Do people experiencing psychotic episodes generally have that insight?