The phrase "to see the transformation" means observing the process of something changing or becoming different.
Sentences with «to see the transformation»
Loved seeing the transformation of different 3rd pieces added to the basic look and seeing how it can change the feel of the outfit. (bowsandsequins.com)
«We knew we weren't seeing transformation in the classroom,» she said. (frontandcentral.com)
She loves seeing the transformation from broken or abused to happy, loving and healthy! (vtvettechs.org)