It’s Mark, not Gemma

Lumon went to great lengths to ensure that Gemma’s Cold Harbor innie wouldn’t break upon seeing the crib. They needed her to have no connection to her previous life with Mark, but their plan failed when Mark extended his hand—and she took it.

However, their efforts succeeded with Mark. At the end, when Gemma begged him to come with her, he felt no connection to her and ultimately refused.

In other words, Lumon’s goal with Severance was ultimately achieved—not with Gemma, but with Mark.