Thanks for your question.
You are correct that the flux-based PMSM model is only shipped into Powertrain blockset. And the FEM-Parameterized PMSM block is shipped into Simscape Electrical. It's worth noting that the FEM-Parameterized PMSM comes with many block choices.(Right click on the block -> Simscape -> Block choices). You'll be able to use both 2D and 3D flux linkage dataset to parameterize this block. If you choose to use the 2D dataset, then there is an example script you can follow in the block's help doc to convert the original flux linkage data into flux linkage partial derivatives. for 3D flux linkage dataset, this block and take the flux_linkage_d(id,iq,theta), flux_linkage_q(id,iq,theta) and Torque(id,iq,theta) tables directly.