https://www.pcgamer.com/monster-hunter-world-mod-adds-damage-breakdowns-for-you-and-your-team/

Monster Hunter is a social series designed to be played with friends. Monster Hunter: World is no exception, and even added new social elements in the form of post-hunt emblems highlighting what teammates contributed to the hunt—things like most monster parts broken, statuses applied, or slinger shots landed. One of the most coveted emblems is for most damage dealt, which I can only assume inspired modder muriEX to create this mod which not only tracks your overall damage, but also your DPS.

As muriEX explained on Nexus Mods, the DPS overlay mod "displays the damage breakdown and DPS of your current team." During a hunt, you can see how much damage you and your teammates are doing at any given moment. After a hunt, you can see how much damage you and your teammates dealt to the monster relative to its overall health, as well as your average DPS.