Os 1809 13 [work] | Kernel
Below is a based on the most probable interpretation: Windows 10/Server 2019, OS Build 17763, with specific reference to kernel changes as of update KB4512578 (September 2019).
Resolved issues with Microsoft account sign-ins, file system access for IoT apps, and on-screen keyboard glitches. kernel os 1809 13
The ISO will include a sources/install.wim file with the exact kernel. Below is a based on the most probable