It was also announced that two more Yellowstone spinoffs are in the works. According to The Hollywood Reporter:
The two spinoffs in the works are a present-day story with the working title of 2024 and another prequel, 1944, that will follow in the footsteps of 1883 and 1923. As with the previous series, the two spinoffs will be produced by MTV Entertainment Studios and 101 Studios.
1883 and 1923 are currently streaming on P+.