Each episode should be on Hulu the day after it airs on FXX.

Season 17 premieres on July 9, 2025, with a two-episode premiere on FXX. New episodes will be broadcast each week at the same 9:00 p.m. ET/PT as usual […] Season 17 will be made available to stream on Hulu in the US one day following their linear TV airdate on FXX.

https://www.soapcentral.com/shows/it-s-always-sunny-philadelphia-season-17-release-date-news-streaming-details-cast-details