i DID see the "s", but you're right.. i didn't quite understand what "1H 2020s" meant... does "2020s" mean 2021? 2022? 2023? 2024? 2025? 2026?
and why even write 1H if you're not going to specify the actual year? by writing 1H, does it mean they won't be going into production in the 2H of any of those years above?!
anyway, it's poorly written and confusing.. but that's just my opinion