The information appeared on the game's page in the Nintendo eShop. The Switch 2 version will occupy approximately 20.2 GB and will work in TV and handheld modes.
120Hz support will require a compatible TV or monitor, but it is currently unknown at what resolution and graphical mode the game will be able to achieve such a refresh rate. A frame rate priority mode may be provided.
The eShop also lists HDR and amiibo support. Nintendo has not yet disclosed the resolution and specific graphics settings. Switch 2 supports VRR in TV mode, but it is unknown whether Metroid Ravenous will utilize this technology. The game will be released exclusively for Nintendo Switch 2.