Ackermans

Just finished my first ever watch of AOT. Super good. Only wish they went in more on the Ackermans inhuman abilities. Why is it we only see Mikasa use them in a flashback once and never again? I know it’s only in near death experiences. Or is her inhuman abilities just being super goated with ODM gear? I thought it was cooler in the flashback regardless. Her ass was like the flash.