Thermal insulation composite systems concern exterior walls, but I do not understand the topic of soundproofing here as relating to neighbor noise, rather it refers to within the house.
Reading the combination of both this way, a building material is sought that can be used optimally for thermal insulation as an exterior wall and for sound insulation as an interior wall at the same time (?)
Sound can be "born as sound" (acoustic, that is calling, making music), where heavier building materials are better. But sound can also be converted vibration (footstep noise). In both cases, there can be sound bridges (amplified by improper connections of components to each other, i.e. here the "how" is no less decisive than the "what").
If one does not necessarily want to use ONE material, it is clear due to type approval that the interior walls would have to be made of sand-lime brick. But, as already wrote: the doors are important. They are great transmitters: the frame picks up the vibrations from the masonry, and the door leaf is a large loudspeaker membrane. A stiffer door leaf helps a lot. It is also good to avoid sound as much as possible: carpet instead of laminate where the kids romp.