3rd party VMware tools shown as installed, but not found on the VM

Having trouble updating VMware Tools on one of the VMs in vSphere v6.7u2. The UI says that VMware Tools are not managed by vSphere, are installed, but not running.

This usually points to open-vm-tools package being installed, however they don't seem to be installed at all:

# dpkg-query -s open-vm-tools
dpkg-query: package 'open-vm-tools' is not installed and no information is available
Use dpkg --info (= dpkg-deb --info) to examine archive files,
and dpkg --contents (= dpkg-deb --contents) to list their contents.

vmware-tools isn't installed either:

# dpkg-query -s vmware-tools
dpkg-query: package 'vmware-tools' is not installed and no information is available
Use dpkg --info (= dpkg-deb --info) to examine archive files,
and dpkg --contents (= dpkg-deb --contents) to list their contents.

When I try to install the bundled package, I don't even get an option to - all greyed out

Pretty sure the solution is simple, but Google just keeps showing me how to install VMware tools.