Building Blocks Scripts License Question

Hi, I have a question about Building Blocks in Unity. Is it possible to modify them (e.g. change the defaul mesh to my own) in order to create a project for Meta Quest 3. I'm mainly asking if the scripts of these Building Blocks can be modified. It's not entirely clear to me from the License Agreement. For example, 1.2.1 says: You may not modify or create derivative works from any SDK or its component (other than sample source code described in this Section or expressly authorized by the documents accompanying the SDK);