See the announcement thread:
https://forums.developer.nvidia.com/t/jetpack-4-4-l4t-r32-4-3-production-release/140866
You might need to log in to get to this, not sure, but change log:
R32.4.3 Release Notes
A “DP” is a developer preview, and not a full release. The actual R32.4.3 is a full release.