After install winfsp-2.0.23075.msi and sshfs-win-3.5.20357-x64.msi on Window server 2019, access Linux path success via command like net use Z: \sshfs\vault@172.16.7.222, provided user name vault and its password, I got drive Z mapping on windows side, that's great.
then go to drive Z, New add a folder or Text Document by right click mouse, then refresh location, I got 4 new folders/text file added, please refer to add screenshot for details:

when try to drag and drop a new file, it will prompt destination already has duplicated file, screenshot:
