Another thing you can check directly in Log Analytics: Is the function really never invoked, or do the runs just not finish? In my case, the trigger itself called the function as expected, but the function somehow crashed during its run, without an error. At one point, the logs just stop. Those invocations didn't show at all in the invocations menu. On checking the service plan, I found that the resource was probably too memory-constrained, so I switched to a more expensive service plan.