That is correct. Upadana leads to accumulating new kammic energy.
P.S. Taṇhā happens automatically due to “bad gati.” We have control over “upādāna” because that is when we become aware of the “attachment.” Thus, if we are mindful, we can realize we have started cultivating abhisankhara and stop it. That is the basis of Ananapasati/Satipatthana!
See “Difference Between Tanhā and Upādāna.”
