According to JustWatch, it is available on Hulu with a subscription. It's available to buy on Amazon and AppleTV.
Not the point. Roku says the high quality science fiction program Timeless is available on Gaia. It isn't. Person of Interest is, but it's in German with no English subtitles. Roku needs to do better at checking program availability. Assuming it's an AI that detects program names on Roku channels, it needs an upgrade. Roku also ought to bring back My Feed, but that's a separate issue.
There is a bug with some services on Roku where the language defaults to German (Deutsch). I have had that happen on FreeVee. You can change it once the program starts. There is a thread here that started with some episodes of Star Trek on Paramount+, but it has the same fix:
