Nintendo has recently intensified its telemetry checks. If you install any unsigned NSP (including an update) while connected to the internet, your console's certificate will be flagged. Result: Permanent online ban (no eShop, no online play).
Ring Fit Adventure , released by Nintendo in October 2019, utilizes a standard Nintendo Switch update architecture. While the base game (v1.0.0) shipped on cartridge, subsequent updates (up to v1.2.0) were released to add features (e.g., "Rhythm Game" mode), fix localization bugs, and adjust peripheral calibration. In the context of NSP distribution, these updates are distributed as separate .nsp files that must be layered over the base game. ring fit adventure switch nsp update upd
Significant updates (like version 1.2.0) added entirely new ways to play, such as the Rhythm Game mode. Ring Fit Adventure Switch NSP: Everything You Need