Hollow Knight: Silksong is startlingly difficult, and its sheer aggressiveness has sparked broad discussion about how it compares to the first game and how player-hostile it can feel. Almost all of the top player-made mods for Silksong reduce the difficulty in some way, and I'm particularly struck by one creator's solution to its notorious boss runbacks.
Nexus Mods rankings show that 12 (arguably 14) of the current top 15 most popular Silksong mods rein in the difficulty, either by adding in new features, giving the player more resources, or outright circumventing some systems. This can range from total invincibility to reduced incoming damage, and I'd put modder Kassent's "Stakes of Marika - Rebirth Anywhere" mod somewhere in the middle power-wise.
