New estimates coming out in New York on the antibody testing. As of this moment it points to 0.7% mortality, but as active cases resolve that will move up there just like it has everywhere else. They still have over 80% of their cases active, so there is a big potential for it to move up. South Korea was less than 1.0% when I started following, but they have slowly moved to 2.2% as cases resolved. New York will do the same, but the difference is that this is based on antibody testing.
There are definitely cases that were attributed to COVID that weren't, but there were also many that weren't called COVID that were. It's happened everywhere.