The reason you see many discussions online about "FIFA 18 Switch Update" with no actual results is due to the consumer backlash at the time.

In the pantheon of portable soccer gaming, there is a Before and an After. Before September 29, 2017, the idea of playing a console-authentic version of FIFA on a bus or a plane was a fever dream reserved for the PlayStation Vita’s abandoned ports. After that date, we got FIFA 18 on the Nintendo Switch.

Released in 2017, FIFA 18 was built on a custom engine specifically for the Switch, rather than the Frostbite engine used on PlayStation 4 and Xbox One. Despite missing some features like "The Journey" story mode, it provided a fluid, portable football experience that ran at 60 frames per second. For many fans, it was the first time a truly modern, high-fidelity sports game could be played on the go. The Ecosystem of ROMs and Updates In the context of emulation, a

A free 1.5 GB content update that added all 32 World Cup teams, authentic stadiums, and the World Cup Ultimate Team mode.

Download a clean Base ROM (legal dump) + separate Official Update NSP + separate Modded Squad File.