Hi phoenixx,
On Page 3 of Letter of Eligibility:
"Under this group policy, the eligible traveller/s listed below have access to International Travel Insurance which includes epidemic/pandemic (such as COVID-19) coverage and cover while cruising including while aboard a foreign registered cruise vessel in Australian territorial waters. Cover is outlined in the sections below, subject to the terms, conditions, exclusions, limits and applicable sub-limits outlined in the Policy Information Booklet."
The PI Booklet is viewable online as part of the complete information forwarded by Westpac, and a scan through reveals the normal travel insurance inclusions and exclusions. Allianz is the underwriter.
Hope this helps.