I was linking the proposers day video not as a direct answer but rather to try and show how that specific aspect is connected to all the other research going on

I was linking the proposers day video not as a direct answer but rather to try and show how that specific aspect is connected to all the other research going on on this topic as well. And they even mentioned in that video that TA2 is the particularly hard problem. And to address your question I linked the teaming page which does go into what the teams are pursuing to solve that problem. One of the teams addressing the specific issue you brought up is the USC team. They are developing electric field stimulus systems to drive regeneration of optic nerves along with real time imaging/monitoring equipment so that they can control said stimulus to drive regeneration along the paths they want. TA2 is very big/broad and a lot of different teams are taking quite different approaches at how to address aspects of TA2.