Answer
Does GTA 6 have a first-person mode?
Rockstar has not announced a first-person mode for GTA 6, and An Extended Look is shown in third person. GTA 5 added a full first-person camera in its 2014 re-release.
When GTA 5 reached PS4 and Xbox One in November 2014, Rockstar added a complete first-person mode, with a cockpit driving view, aim-down-sights shooting and full on-foot first-person, and it carried into GTA Online.
Does GTA 6 have a first-person mode?
Rockstar has not announced a first-person mode for GTA 6, and An Extended Look is shown in third person. GTA 5 added a full first-person camera in its 2014 re-release.