FPS drops only occur in the hub and only near the Felyne support stand, which checks for add-ons. Digital Foundry tested the "Less DLC Checks" mod and recorded a performance increase on a system with a Ryzen 5 3600. At 1440p resolution, ultra settings, ray tracing enabled, and DLSS in Balanced mode, the indicator increased by 11.4%.
At minimum settings, with DLSS in Ultra Performance mode and without ray tracing, the increase was 25.6%. However, the problem does not affect the main gameplay, monster hunting, and exploration. The situation is only relevant for PC and does not affect console versions.