Indeed, Escanor's death occurred in the manga. His fate was a significant plot point that had a big impact on the story. It was a poignant moment that added depth to the narrative.
I'm not entirely sure if there is a specific 'naruto is escanor fanfic' out there. It depends on the creativity of the fanfic writing community. Some writers might be interested in exploring how Naruto's personality and abilities would interact with Escanor's, perhaps in a scenario where they meet in a different dimension or something. But you'll have to do some searching on the major fanfic platforms to be certain.
The Immortal Cultivators vs. Superpowers Manga was a hot-blooded sci-fi mech manga. It told the story of a powerful cultivator who accidentally transmigrated to the modern hero society and started a fierce confrontation with superpowers on Earth. The manga was created by the author, Milk Powder No. 1. It was currently in the midst of being serialised and was updated to chapter 305. The manga's rating was 7.2 points, and its combat power was 998 million. The manga could be read online on platforms such as Snowstep Animation and Animation House.