Honestly I think this is an HPC CPU that has been AI-washed. Then you might ask why not use GPUs for HPC and I think the simple answer is that Fujitsu just doesn't want to take on the effort of building a GPU.
Yeah, this very much gives the vibe that the original plan was to design a CPU, then suddenly AI AI AI happened, and they squeezed some matmul units into the design at the last minute in order to please the higher ups.