The data for newer spotlights (2020-, somewhat known as seasons) can be obtained through getRoom()
but you can't really get the id of those newer spotlights without going through the website's URLs (https://osu.ppy.sh/seasons/latest) as far as I know :(
Get ALL legacy spotlights! (2009-2020, somewhat known as charts/ranking charts, available @ https://osu.ppy.sh/rankings/osu/charts)