Hi masterwok,
I am Sumit here to assist you with this question.
You mean Build Lab version? This is because 19041, 19042 and so on share the same codebase. All Builds are based on 19041 code, where just the enablement package increments the Build number. Every feature in 19043 can be enabled in the back Builds too, provided the same has the latest monthly update installed.
Hope that makes sense and helps.