An update to the Explorer for ChangeMan ZMF V1.0.1 has now been released and is available on the Micro Focus Marketplace..
This version now r supports File Icon Themes that may be enabled within VSCode. ZMF Explorer makes use of 2 icons - the 'Folder' icon and a 'File' icon. However the default VSCode File Icon theme "Seti' does not provide an icon for a Folder, so no folder icon will be displayed if using the 'Seti' File Icon Theme.
You can check which File Icon theme is in use by clicking 'View' 'Command Palette' and searching on 'File Icon'. Switching for example to the 'Minimal' icon theme will then display icons in the ZMF tree view. However, a recommended File Icon Theme that you may wish to install as an Extension is the 'Material Icon Theme'. You can install this from the Extension menu. That theme provides customization options to allow you to set your preferred icon colors.