The acquired company may have (probably was) already compliant, or it ended up being better to allow them to continue to operate independently.
The only surprising thing here is that you think all Google acquisitions are shaped the same.
The owners may have also just demanded to remain independent as part of the acquisition. Or the wind blew a little from the left on a Tuesday in July; there are a million reasons why Qwiklabs might not have fully rebranded or re-integrated such as you would like them to.
It means nothing.