Normal randoms do not per se give any Undaunted reputation. Only the pledge quests, the skill point quests for each dungeon, and the weekly trial quests do.
If you turned in the pledge quests to the questgivers and still didn’t get Undaunted rep, that would be a bug - I would file a report. But just doing a random or the dungeon assigned as a pledge without their respective quests won’t give any points.