Maybe one of the things you don't need are compliments. My T doesn't give any to me personally. She has me try to prove or disprove things about myself, but she doesn't give her own opinion. If I say "I'm a whale", she'll make me say it out loud process how it makes me feel, and then prove or disprove it. Usually, my perception of myself is wrong, and this exercise helps me make my own decision about myself.

ETA: To find out what you need, you can talk to your T and try different things. It might take a few weeks to figure it out. And of course it can't cross yours or your T's boundaries. Maybe you need a hug? Need to cry? Just listen to you without any judgment? Empathy?