So there's multiple reasons why we currently have the Bedrock Sentinel the way it is. One of them being how to handle Bedrock packet translation, and the other being the many differences between Java and Bedrock.
We plan on implementing a bunch of new checks (that will ban automatically) to the Bedrock version of Sentinel. However, this may be awhile. You did correctly guess that we just have alerts and have to ban manually. We got over 100 alerts every second.
In conclusion, everything about Bedrock's Sentinel is "tbd". We plan on implementing an in-game reporting system to help players report cheaters while we work on Sentinel.
Locked thread.