When you say the “whole imaging stack,” which one do you mean?
EHT imaged M87 with four teams working independently using different methods. Each of those teams used algorithms that were published and validated before the EHT results were published.
EHT imaged M87 with four teams working independently using different methods. Each of those teams used algorithms that were published and validated before the EHT results were published.
Now that you've read the correct paper, you know that. You could have also learned it from the news releases, as it was an important part of the science.