Coming back to this thread, I now see the restriction “while the Walking activity is active.”
First, I don’t think this is an important metric for “live” use. The reality is “step count” is a basic metric that is most useful when you don’t have access to other metrics. For example, a cheap pedometer you attach to your shoe can give you steps but likely won’t have GPS to measure actual distance. In almost all cases, your actual distance is more important than number of steps.
However, there is a related metric, cadence that can be relevant. This is “steps per minute,” and in running the advice is to typically around 180 spm which is what I tend to go for, although some prefer slightly different values. Search “ideal running cadence” but here’s a starter link: https://us.suunto.com/blogs/blog/tracking-cadence-heart-rate-and-pace-while-running
So I’d look to cadence for “how effective are my current steps” and distance instead of total steps.