The BioNTech investor relation website has some information: https://investors.biontech.de/news-releases/news-release-details/pfizer-and-biontech-provide-update

The BioNTech investor relation website has some information: https://investors.biontech.de/news-releases/news-release-details/pfizer-and-biontech-provide-update-omicron-variant https://investors.biontech.de/news-releases/news-release-det... But I'd not consider it a valuable source for tracking the progress. Edit: It's also from 2021-12-08 - probably way too old to be meaningful, a lot of knowledge has been acquired since then.