When I say FiOS, I'm thinking gigabit+ FTTH/FTTD (I'm not 100% sure of the difference). Given that you quoted people per sq km (about 70-84 people per sq. mile), you're probably not in the US. In the US, it's hard to get fiber outside of areas with the high density I'm quoting (at least in my experience).
But yes, that density seems fine for Starlink (although maybe it isn't in the end, who knows yet.)
But yes, that density seems fine for Starlink (although maybe it isn't in the end, who knows yet.)