Hi Sean,
I have seen several other GTIs that have it working. I asked a few people randomly who said that they all received the car with the lights working, none of them coded it. Most recently i spoke to someone in the shopping centre who had a 17-18 model, both lights were on
From my research i found that perhaps in the more recent models, you had to opt for the "dynamic cornering lights" or something package to have the inner ones on. Where as in the 17 or 18 models the performance models had them working from factory