Sure does. The death of Iron Man in the Avengers: Endgame comic is a pivotal plot point. It changes the course of the story and leaves a lasting impression on readers.
In the Endgame comic, Iron Man tragically meets his end. His sacrifice is a key plot point that has a huge impact on the story and the other characters.
Iron Man indeed passed away in the Endgame comics. This was a shock to many fans but added depth and drama to the narrative. It led to new developments and challenges for the remaining heroes.
The placement of the Avengers in Iron Man 3 fanfiction can be all over the place. It could be that they show up to assist Iron Man, or they might be off on their own missions and only mentioned briefly. It all comes down to the imagination of the fanfic writer.