https://www.aacargo.com/ship/schedules.html
check the domestic widebody schedules for 772 and 77W routes, but it's essentially 4 days in September and 1 single flight in October that have it. Not great, but is DL (standard recliner) the only competition on the route?
This doesn't account for the 321T but I don't think that bird is on MIA-LAX at all (I'm sure someone will correct me if I'm wrong)