Yes, there are some. Some fanfictions explore this dark concept in interesting ways. They might show how his death impacts the shinobi world, like the grief of his friends and the power vacuum it creates.
One common theme is sacrifice. Naruto gives up his life to ensure victory in the war. Another is the impact on his friends and family. They have to deal with his loss.
Perhaps Naruto is betrayed by someone he trusts deeply. This person leads him into a trap at the Valley of the End. Naruto, being caught off - guard, is fatally wounded. His death in this fanfiction could be a tragic end to his journey of becoming a great ninja and a symbol of how even the most powerful can be brought down by treachery.
Perhaps a new, unknown force. With Naruto gone, a previously hidden group with a vendetta against the ninja villages could emerge. They might blame the villages for the destruction caused during the war and see Naruto's death as the perfect time to strike, when the villages are still recovering and vulnerable.
One possible plot development could be that the Hidden Villages struggle to maintain peace without Naruto's influence. His death might lead to power vacuums and political unrest. For example, some villages may try to take advantage of Konoha's weakened state. Another aspect could be how his friends and family cope. His wife, Hinata, might have to raise their children alone, and his friends like Sasuke would feel a great sense of loss and perhaps guilt for not being able to protect him. The ninja world as a whole could also lose its hope symbol, and new, darker forces might emerge, thinking that without Naruto, they can carry out their evil plans more easily.
Madara Uchiha might be the main antagonist. He has grand plans for the ninja world. He could see Naruto as a threat to his vision and engineer a situation in the Valley of the End where Naruto is killed, either directly or by using Sasuke as a pawn.
Perhaps in this fanfiction, Naruto is fatally injured by a powerful enemy who has lured him to the Valley of the End. He's outnumbered and despite his best efforts, he succumbs to his wounds. His death then has a profound impact on all his friends and the entire ninja community, leading to a new era of unrest and a search for a new hero.
Sasuke could be responsible. Their relationship has always been complex. Maybe in this fanfiction, their rivalry escalates to a point where Sasuke accidentally kills Naruto during a fight at the Valley of the End.
If Naruto dies in the Fourth Shinobi War in fanfiction, it would have a huge impact. For one, the morale of the Allied Shinobi Forces would plummet. Naruto was the symbol of hope. Without him, many might lose the will to fight. His friends like Sasuke would be deeply affected. Sasuke's whole journey of redemption was somewhat tied to Naruto. His death could also lead to a power vacuum. Nations that were relying on Naruto's strength and his idea of peace might fall into chaos as they scramble for power or new forms of protection.
One of the most heartbreaking scenes could be when his friends find out about Naruto's death. For example, Sakura, who has been with Naruto through so much, would be completely shattered. Her reaction of disbelief and then overwhelming grief would be really sad. Another scene might be when the whole village of Konoha hears the news. The silence that would fall over the village, with people just stopping in their tracks, would be a very poignant moment.