Just chipping in here, as parent of DD who used to qualify for just about every event except 1,500m and 400IM pre-covid.
Down where we are the timetable is arranged so that every sex/gender can only swim 3 events per day (what with heats and finals). 400's always used to be on first thing so one day girls would swim 400 free and boys 400 IM. I think that might have changed because this format left a very limited pool of people willing to volunteer to marshall etc.
It was great for the boarders with the pool a walk away; less stellar for those of us needing to drive for an hour each way.
After 2 or 3 years of Counties we just entered events where we figured DD would get to the final and hopefully be inspired to PB.
These days, if we final in 8th place with most swimmers a lot faster, we decline the final and go home (unless we want a Regional time).
Very few youngsters swim 400 IM, especially LC, so it might be a great opportunity to medal at a young age (or leave the pool feeling thoroughly depressed if other swimmers have plenty of LC experience).