In the context of Switch backup and emulation scenes, you will often find this update in two primary formats:
Ensure your system or emulator is running a compatible firmware version (typically 14.0.0 or higher) to support the 2.1.0 update. Metroid Dread Switch NSP/XCI Update 2.1.0
The standard format used for digital eShop content and updates. In the context of Switch backup and emulation
A cartridge dump format. Some "All-in-One" XCI files include the base game plus the 2.1.0 update pre-installed. Important Notes Some "All-in-One" XCI files include the base game plus the 2
Face 12 bosses consecutively to achieve the fastest time. Damage carries over between rounds, but missiles are replenished.
For retail users, follow the official Nintendo support guide to apply the latest software automatically via the internet. How to Update Metroid Dread | Nintendo Support
Defeat as many bosses as possible within a 5-minute time limit. Each victory adds extra time to the clock.