Just filming alone for season 1 of Severance  took 11 months to complete, and with writing underway as of July 2022, we wouldn’t expect to see season 2 of Severance debut until late 2023 at the earliest, with a 2024 return more likely. By our estimates, that lines up with the current October 2022 - May 2023 shooting schedule. As yet, however, no official date has been revealed.
To complicate matters, the ongoing Writers Guild of America strike is slowing production down right across Hollywood, and Severance season two has not escaped that upset. Those holding their breath may want to take another gulp of O2...