This specific update (47270) focused on cross-platform reliability:
To run this version effectively, your Mac should meet these specifications: Parallels Desktop Business Edition v15.1.4-47270
Shifted from OpenGL to Apple’s Metal for improved graphics performance, including DirectX 11 support. Parallels Desktop Business Edition v15.1.4-47270
Support for mass deployment with Jamf or other MDM solutions to provide pre-configured Windows images to employees. Parallels Desktop Business Edition v15.1.4-47270
Enabled the ability to update Parallels Desktop without requiring an administrator password each time.