Question for adults with ARFID

Hello all. My only experience with ARFID is with my now 13 year old son. For those of you who are grown, did you always have ARFID (I know there wasn’t always a name for it), or did your symptoms develop later in life? My son has dealt with it since birth so it never occurred to me it could be any other way. After reading some posts on this sub I am beginning to see this may begin differently for everyone so I am just curious.