As there weren't any reports for sulfur oxide, only for sulfure dioxide in any of the sources i could find, my answer is for the amount of metric tonnes of SULFUR DIOXIDE (SO2) that the company emited. "The main difference between sulfur and sulfur dioxide is that sulfur is an element whereas sulfur dioxide is a gaseous compound." (https://pediaa.com/difference-between-sulfur-and-sulfur-dioxide/). I did this because they are very similar.
This is found in page 231, bottom right table: "Other emissions, SO2 (T), 2019= 0.44"