Here's what I saw regarding the cabin mate
"A statement from the cruise line, however, said his cabin mate actually last saw him around 7 a.m. “around the time the debarkation of guests was beginning.”
https://www.local10.com/news/local/2023/09/07/coast-guard-suspends-search-off-miami-for-missing-carnival-cruise-ship-passenger/
Whole thing is really weird! Reminds me of a long ago story about a young woman who went missing from a ship and was never found.