Dear Robert,
Please be informed that Sen2Three 1.1.0 supports the processing of Sentinel 2A and 2B Level 2a input products (PSD version 14.2) and is compatible to Sen2Cor Version 2.4.0 (the actual version of Sen2Cor is 2.8).
In addition to this, the development and maintenance of the new Sen2Three version is planned to start in the near future (within 2021).
Best regards,
Fabrizio