One adult recent post college child 22-23, has significant mental health challenges that have grown since 15, and trying to seek help( all college friends live away now , struggle to be social , purpose etc), - 22-23 yr old are closed off from other adult son 2 years older. and have significant reservations about the older brother - different views in world etc - (part of illness).

Both live at home for the time -older finishing a higher degree soon.

Should the parent share with older child that there are mental health concerns and we are trying to feign a little patience while help is being sought . It is not anyone’s fault or not much that older bro can do bc younger doesn’t even show acknowledgement - can do for him right now— I can tell older son knows something’s up but there is zero communication.

I wanted to address it akin to “it’s as if he had a car crash and needs help”, or “another health diagnosis and requires some significant help right now”.

I want to let older know, this is NOT personal and need him to continue his own life etc . If/when younger is ready , we hope more can be shared and communicated

Would that be violating some privacy for younger ?