That was done on purpose by the Devs, there's no technology increase in this mod... Mainly because the technologies there are CK II vanilla and they don't simply fit right within the world of Westeros as it's been mostly static for thousand of years from what they said.
Also, they plan to look at it eventually, and add their own unique flavors, but for now think they prefer to focus on other matters first...
I've got tech increases. Not many but a few up to lvl 1 after 50 years.