Deus Ex, a first person immersive sim with a lot of similarities to Cyberpunk 2077, used Unreal Engine. The more recent games in the series were a different engine.
To be fair, Deus Ex is nowhere near the scope and complexity of Cyberpunk 2077
They pay a hefty license if they choose to use third party middleware/engines. Perhaps CD Projekt Red are in danger of having features cloned etc.
The Outer Worlds
Star Wars Jedi Fallen Order
Final Fantasy 7 Remake
Days Gone
Code Vein
Played TOW, FF7R and DG. Yes all are games, but that's about it. They don't compare to each other, let alone to Cyberpunk 2077. Lets go with TOW as it is the only first person game. How can you compare the dialogues in CP 2077, where you can walk away and move around to those fixed camera frames of TOW?