I've only seen Machine Games and Id Software use Id Tech, I don't think it's available for other commercial use and licensing, it's only for some Microsoft game studios.
The main problem with game engine is that generally, they are made for one thing only. Sure Id Tech is great, but try to make Elden Ring with it, I'm sure it's going to collapse very fast. RE is having this problem right now. It used to run game perfectly well, like RE 2 Remake or DMC 5, but with Dragon's Dogma 2 and MH Wilds, it's starting to crumble very fast. Even if you could license Id Tech 7, I don't think you could do that much except FPS / TPS linear games.
I've only seen Machine Games and Id Software use Id Tech, I don't think it's available for other commercial use and licensing, it's only for some Microsoft game studios.
The main problem with game engine is that generally, they are made for one thing only. Sure Id Tech is great, but try to make Elden Ring with it, I'm sure it's going to collapse very fast. RE is having this problem right now. It used to run game perfectly well, like RE 2 Remake or DMC 5, but with Dragon's Dogma 2 and MH Wilds, it's starting to crumble very fast. Even if you could license Id Tech 7, I don't think you could do that much except FPS / TPS linear games.