https://wccftech.com/intel-10nm-alder-lake-desktop-cpus-2021-launch-full-7nm-cpu-gpu-family-2022/

It looks like Intel's 10nm Alder Lake Desktop CPUs which would be part of the 12th Gen Core family have appeared in a leaked slide which hints at a release around 2021 with a full 7nm product line expected by2022. The slides which are from Intel's POA roadmap shows new developments taking place in the entirety of 2020 and the years ahead.

We cannot say how authentic these slides are but it looks like they were presented in the APAC region. One of the slides is similar to Intel's Investor Meeting held back in 2019 so it might be possible that we are looking at older slides with information that wasn't shown to the public until later on.