I have finished all the relevant quests and never received my 2nd skill. I’ve finished through Feiton but being a Paladin this REALLY hurts me in group activity.
2nd awakening questline is not relevant to the main story, so you might have missed it.
And if you don’t remember doing 4-8 hour long 7 purple chain questslines throughout all the previous continents and sea - you definitely missed it.
After finishing Rohendel story you should pick up purple quest “Strange Mail” from mail NPC in Rothun (city). From that point you embark on your extravagant journey to second awakening skill.