The most plausible explanations are:

This specific version addressed several bugs that were present in the earlier 1.19.50 release:

: While Windows 32-bit support is deprecated in newer Java versions, Bedrock 1.19.51 provides a stable experience for users on older Windows installations that cannot run current 64-bit-only builds. Education Edition : A version-specific beta for Minecraft Education was also made available during this cycle. Minecraft Education Support How to Install or Update Mobile (Android/iOS) : Open the Google Play Store