Azure Security Center mainly uses LAW when you need to export alerts, recommendations or logs to Sentinel. It is done by enabling 'Continuous Export' from Security Center. (Can share the steps on how to do that if you need).
I think it's a good reason to point out that using the Sentinel LAW gives a better and easier integration between Security Center and Sentinel.
If my answer was helpful, please upvote and if I resolved your question please 'Accept it as an answer'.