Since December 13th European Space Agency started processing L2A data on global basis and these are available since then on Sentinel Hub as well.
There is a few hours of a delay between L1C and L2A but the production seems stable. The charts below show how long it takes from acquisition of the image in the satellite to when the scene becomes available on ESA’s distribution service. It takes another 30-60 minutes since then to be available in Sentinel Hub as well (both for L1C and L2A)
To use L2A data, you have to configure new layer and set the data source accordingly:
Within WFS service (to get available dates/scenes) you have to use DSS2 as a Feature Type (TYPENAMES=DSS2)