Seamless global connectivity in 6G requires a 3-dimensional network (or 3D network) that unifies terrestrial and non-terrestrial networks (NTN), which encompasses aerial and satellite networks to provide connectivities for a mass number of devices in industrial IoT. Even though computing resources in 3D networks can be used for computation offloading, scheduling communication and computing resources in such a highly dynamic and resource-constrained environment is challenging. This paper addresses the challenge by identifying research questions regarding resource allocation, considering handover dynamics and energy efficiency. Subsequently, we highlight the current status of our studies towards an intelligent scheduling strategy in softwarized 3D networks.