The recent update 2.1.0 for Metroid Dread brings several improvements and bug fixes to the game:

October 2024 Game: Metroid Dread (MercurySteam/Nintendo) Focus: File formats (NSP/XCI), Update v2.1.0, and ES Verified signatures

Metroid Dread on Nintendo Switch: NSP and XCI Update 2.1.0, ES Verification

often refers to "Electronic Signature" verification used in technical file sharing to prove a file hasn't been tampered with.