@jmendrok
The problem with the L2A data in the sentinel hub is, that not all of the L1C are corrected. There is a pre-selection by ESA/Copernicus (?!). Unfortunately I didn’t get an answer how they select which image is worth to correct and which image is not. But a huge amount of L1C data are not corrected.
See the discussion here: https://forum.step.esa.int/t/applying-sen2cor-on-a-s2-subset/8740/14