I'm going to try this recipe/method for frozen chicken breasts in my IP.
https://fitfoodiefinds.com/instant-pot-chicken-breast/
If it works that would be a huge win because it's so simple (that I'm not even convinced it'll work). Then again I can never cook meat (especially chicken and steak) without it turning dry. Last time I tried making shredded chicken following a recipe in the IP book I got to finish it alone over the next 3 days...if that tells you how it turned out lol
I make shredded chicken frequently. I add a couple of tablespoons of the pot juices after shredding with a mixer. Very moist, but needs lots of spices.