Tier 2 gunnery school bugged

Having great fun with the DLC but another day another bug unfortunately. Most are benign but this one is impactful. I unlocked tier 2 gunnery school over 10 turns ago and have upgraded several times already. However the quest for t2 gunnery has not triggered, and the amethyst units have not unlocked.

I feel like unfortunately I may need to restart, as I am missing the normal experience of the campaign, or is there a way to salvage this?