Oppenheimer is being distributed by Universal Pictures, which sends all of its theatrical titles to stream on Peacock ... at some point.
Fast X, which opened in theaters May 19, hasn't yet gotten a digital release date nor a date to stream on Peacock.
Going back further, Super Mario Bros. opened April 5, with a digital release date of May 16 (which was 41 days later). It will finally go to Peacock on Aug. 3 (or 120 days later).
Oppenheimer has a much longer theatrical window, so we expect its timeline to be drawn out. If the digital release is sometime in mid- to late-October, then Oppenheimer might head to Peacock in mid-December — or right smack in the middle of the holiday season.