For D:OS 2 there are mods that can let you change the pitch angle.
D:OS 2: Improved Camera - for the Definitive Edition, the script may need to be edited, as described in one of the most recent, top comments; when I checked the executable version some time ago, it worked without issues.
Better Camera 2 + Hide UI for DOS 2 Definitve Edition - The original author has not updated the mod for recent game updates, but Canoob in the comment section has posted an update for the current v3.6.69.4648 (
Dropbox link).