https://wccftech.com/doom-eternal-third-person/

DOOM Eternal features a third-person camera view that can be enabled with the help of CheatEngine and console commands.

The third-person camera view works well enough, but it makes the game obviously more difficult, as DOOM Eternal was not meant to be played this way. Still, it's interesting to see how most of the game's best features remain intact even with such a drastic change.