LabPlot was just released in version 2.8.1 which is running well on Windows and should find a place in the Microsoft Store to increase distribution. The released Windows package was build in the Binary Factory (Labplot_Release_win64).
Can you give me access to the KDE e.V. partner center on the Microsoft Store to submit it as described in the Submission guide https://kate-editor.org/post/2019/2019-11-03-windows-store-submission-guide/?