Can Magic Initiate feat spells be swapped? [on hold]

For example, a Sorcerer takes the Magic Initiate feat into Wizard at level 4 because they have been researching their new-found magic and learning all they can. It stands to reason that they would continue their research of magic over their next 16 levels, which indicates that they should learn new spells.

At any point can the spells chosen through the Magic Initiate feat be swapped out for other spells using the same spell selection rules of Two cantrips and One 1st-level spell?