It seems like PlayStation Plus is losing quite a few of its games, and it's unclear why they're leaving the subscription service.
According to the "Last chance to play" section on the PlayStation Plus menu on PSN, there are several notable games under it. It also seems like the section differs between regions:
North America
NBA 2K24
Need for Speed Unbound
Destroy All Humans!
Destroy All Humans! 2: Reprobed
Spellforce: Reforged
Trials of Mana
Lost Judgment
Moving Out 2
Midnight Fight Express
Sea of Stars
Europe
Horizon Forbidden West
Marvel's Midnight Suns
Alien Isolation
Nier Replicant ver.1.22474487139...
Spiritfarer
Star Ocean: First Departure R
Star Ocean: Till the End of Time
Star Ocean: The Last Hope 4K & Full HD Remaster
Star Ocean: Integrity and Faithlessness
Star Ocean: The Divine Force
It's currently unknown why these games are being removed, with the exception of NBA 2K24, which comes shortly before the launch of NBA 2K25. The game is also being removed from Xbox Game Pass on August 31. However, the rest of the games listed, at the time of this writing, will disappear in about an hour. Unlike Microsoft, which consistently lets players know what games will leave Xbox Game Pass and when, PlayStation hasn't brought much attention to this.