Changes how physical objects behave. They can be assigned to objects from an object’s Physical component.
Physical materials can be managed from the Physical Materials panel in the Hamburger menu.
Physical Materials on an object can be changed in the details menu of the Physical Component.
Physical Materials can also be managed via the Physical Node of any object. Tap the Physical Material parameter to select a new material, then select the plus to add a new material or the pencil to edit existing materials. Editing existing material will change that material for anything that is using it.