A 1 year old baby should poop at least once per day or once every 3 days depending on the 1 year old toddlers diet.
The more fiber they eat or intake the more often the 1 year old will poop but as long as the 1 year old is pooping at least once every 3 days then they're not constipated.
A 1 year old toddler should have at least 4 to 5 really wet diapers per day which means they're hydrated enough and if they go through less than 4 to 5 diapers per day when wetting then the baby is likely dehydrated.
The 1 year old child's urine should be pale and mild smelling and that goes for all ages as well.