I read about the photonic QC Jiŭzhāng that showed quantum advantage by Gaussian boson sampling. I read that boson sampling itself is a sub-universal technique of QC (where they use single-photon states as input states). In the paper, the scientists describe how they use squeezed states for their computation, which can be produced deterministically (making it better realisable then producing single-photon states).
I know the term "squeezed states" from continuous variables approaches (which e.g. Xanadu uses), where a squeezed state is an ellipse in phase space. So I am wondering, whether boson sampling is a special algorithm implemented within the continuous variable approach in QC? Or is it really a totally independent approach of QC?