I’ve a 6 year old who is the same, takes forever to eat anything, will never finish his plate, but again he eats healthy and is happy.. The Mrs brought it up with the doctors but they were happy enough.. His 2yr old brother is the opp, eats plenty always wants more etc,we get the occasional day where he gets a hunger burst and devours everything but mostly just picks..we’ve given up worrying now, he’s active and happy so have stop forcing the issue..