@Amaiteo
More like 'unleashed', I think... she is a nexus being and was foretold in the Darkhold... the Mind Stone just woke up what was already there.
Alternately, I think it could be argued that the Mind Stone did somehow give she and Pietro their powers (since 'mutants' weren't officially a thing yet) but that Wanda already had OTHER abilities from who and what she is that have since manifested themselves more fully, leaving her Mind Stone-given powers now an afterthought. Kind of like how in the comics she is both a mutant with 'hex' powers AND a powerful sorceress...