This version introduced and refined several presentation tools that were previously exclusive to Office 365 subscribers:
alsyundawy/Microsoft-Office-For-MacOS: Installer ... - GitHub Microsoft Powerpoint 2019 VL 16.43
Report: Microsoft PowerPoint 2019 for Mac (Version 16.43, VL) Microsoft Powerpoint 2019 VL 16.43
Version 16.43 is the final version to support macOS 10.13 High Sierra . Subsequent versions required macOS 10.14 Mojave or later. 2. Major Features and Improvements Microsoft Powerpoint 2019 VL 16.43