The Entertainment Software Rating Board has rated the Pixel Remaster versions of Final Fantasy I, Final Fantasy II, Final Fantasy III, Final Fantasy IV, Final Fantasy V, and Final Fantasy VI for PlayStation 4 and Switch.
The Pixel Remaster versions of the first six Final Fantasy games are currently only available for PC, iOS, and Android. Final Fantasy, Final Fantasy II, and Final Fantasy III launched on July 28, 2021, followed by Final Fantasy IV on September 8, 2021, Final Fantasy V on November 10, 2021, and Final Fantasy VI on February 23, 2022.
Thanks, r/FinalFantasy.