Quick answer: The version 1.0.0 license notices for the Switch 2 Ocarina of Time remake list AMD FSR 1.0 and SMAA with no DLSS entry. It isn't confirmed, and Nintendo hasn't commented. The game launches November 5.
The Legend of Zelda: Ocarina of Time remake on Switch 2 appears to use AMD's FSR 1.0 for upscaling and SMAA for anti-aliasing instead of Nvidia's DLSS. The clue comes from the game's own Intellectual Property Notices for version 1.0.0, shown in a clip that SuperMetalDave64 posted on X a few days before the November 5 launch.
According to Notebookcheck and Output Lag, the notices list "FidelityFX Super Resolution 1.0 (FSR)" with a 2021 AMD copyright, a separate entry for an optimized FSR EASU implementation for mobiles (EASU is the upscaling step in FSR 1.0), and an SMAA entry. None of the notices shown in the clip mention DLSS.
FSR 1.0 is a spatial upscaler. It enlarges each lower-resolution frame on its own, which is cheap to run but brings back less fine detail, and that tends to show on thin things like grass and leaves. DLSS uses a machine learning model plus data from earlier frames, and the Switch 2's Nvidia chip supports it. Some players on the Switch 2 subreddit have already pointed to shimmering foliage in the trailers.
This isn't confirmed. Both outlets point out that a license notice only shows the code ships with the game, not when it runs or what resolution the game renders at, and proprietary tools don't always need a notice, so the missing DLSS entry isn't proof on its own. Nintendo hasn't commented on the game's upscaling.
If it holds up, it would match Donkey Kong Bananza, which Digital Foundry found uses FSR 1.0 and SMAA instead of DLSS. Third-party games have used DLSS on Switch 2, with Notebookcheck naming Cyberpunk 2077 and Hogwarts Legacy, and Modern Warfare 4 offers a DLSS or SMAA choice. The remake costs $59.99 digital and $69.99 physical in the US.