But also, NCAA rules require swimmers who only qualified for the meet in a relay to swim that relay in the morning (at least) so they can swim their other “B” cuts as well.
This is not completely correct. Swimmers who only qualified for the meet on a relay need to swim that relay in EITHER prelims OR finals. If they qualify on multiple relays (no individuals) they only need to swim either prelims or finals of at least one of the relays. It’s a risk to wait until finals to swim a relay only swimmer, but it’s an option. Steen did this a few years ago with a men’s breaststroker.