The first thing that comes to my mind is that reliance on a external infrastructure (Azure) is a big no no for industrial applications. You would not want your oil refinery plant to stop working because there is a connectivity issue to a server located in a different continent.
Azure, together with Power Platform tools such as Power Apps, is primarily used for large-scale training. Since the odor and gas data require efficient labeling to be reliable, Power Apps combined with Data Explorer provides an easy, cost-effective, and scalable way to manage this process. Once trained, the model can be deployed directly on the edge.