1. It's the same Emergency Use Authorization given Pfizer, Moderna, and J&J. Use of Emergency Use Authorization for a Covid vaccine was, IIRC, authorized in February 2020, and the law creating Emergency Use Authorization was passed during GWB's Administration (possibly 2005).
2. This is not in response to whatever variant is currently circulating, simply because Phase 1/2 (human) testing of this vaccine began in May 2020, a couple of years before Omicron (or whatever) came into circulation, and Novavax had conditional purchase contracts with DoD in June 2020 and with HHS in July 2020. See
https://www.gopbriefingroom.com/index.php/topic,412701.0.html for more details. The Novavax vaccine is not some
CT-grade "Plan B", Novavax was part of Trump's Operation Warp Speed more or less from the beginning.