Heat oil in a large skillet. Mix shrimp with seasoning (chili powder thru cayenne). Cook shrimp in 2 Tbsp. avocado or olive oil 5-8 minutes, stirring occasionally.
Combine remaining 1/4 c. avocado oil, yogurt, and next 6 ingredients. Reserve 1/2 c. sauce and set aside. Mix remaining sauce with 1/2 head green cabbage, shredded.
Add shrimp to tortillas, top with slaw, avocados, jalapeños (if desired), and a little more sauce if desired.