There’s already a Starfield mod that swaps FSR for DLSS

Starfield may only be out for players who forked out for the Premium Edition or the Constellation Edition, but it’s already got a dedicated page on Nexus Mods. The early offerings are sparse, with the usual selection of reshades and mods that would be interesting if they actually worked but sadly don’t. One exception is Starfield Upscaler, which swaps AMD’s supersampling tech for Nvidia’s version.

AMD is Bethesda’s “exclusive PC partner” for Starfield, which explains why it supports FSR rather than DLSS, despite the fact that roughly 75% of PC game-enjoyers have Nvidia cards. AMD has said Bethesda has its “full support” to add DLSS to Starfield, however, so we might see it arrive in an update.