Ovation of the Seas due to arrive in Sydney on 26 Nov '22 is Tier 2 COVID cases: https://www.nsw.gov.au/covid-19/travel/cruising-rules
Tier 2
Moderate impact to vessel
There are quite a few cases on board (30-99 positive cases per 1,000 people) and/or the vessel’s staffing or resources are impacted. However, it can safely maintain critical services.