I don't know anything about using taurine for pancreatitis. But I do try to give my kitties additional taurine, just because I consider that it might be of benefit. But this is just my personal choice and is based on things I've read and on conversations I've had with people who I consider to be smarter and better informed than me.
In the UK we do have pretty decent food production standards, and any commercial cat foods 'should', theoretically, contain sufficient taurine for the average kitty's needs. But, as I said above, I 'choose' to try to boost my kitties' taurine intake. I do this in a couple of different ways. I add a pinch of ordinary taurine powder to their food now and then (dissolving in water first, then adding to food). And I also give my kitties chicken hearts (AKA 'taurine bombs'!). I either give raw chopped chicken hearts, or a couple of freeze dried chicken hearts. My diabetic girl gets at least one freeze dried chicken heart every day (raw would be better, but I can't get her to eat raw....yet...)
I use Felini taurine powder, made for kitties. But any taurine without additional additives is fine as far as I'm aware. ...As with all these things, do your own research as much as you can, and do also consider your vet's advice.
Eliz