Unfortunately, you need Paramount (with cable/cable alternative subscription), to watch same day or day-later "Yellowstone". (current season 4)
You cannot watch the current season of Yellowstone with Paramount+ due to "licensing". I know, unneccessarily confusing.
Here is an excerpt from TV Guide explaining this...(https://www.tvguide.com/news/yellowstone-season-4-how-to-watch-everything-to-know/)
Yellowstone returned for Season 4 on Sunday, Nov. 7, with back-to-back episodes on the Paramount Network. It was simulcast TV Land, CMT, POP TV, and their respective websites as long as you have a cable subscription.
If you want to watch new episodes, Yellowstone continues Sundays at 9/8c on the Paramount Network. If you can't watch on Sunday night, episodes will be available the next day on the Paramount Network app, but will also require a cable login. Due to licensing rights, Yellowstone is not streaming on Paramount+.
The cable-alternative streaming services that contain Paramount are Philo, Hulu, Sling and others. A list of these can be found here...
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