Welcome to the Community,
I'm not exactly sure whether you are asking for the VMware Tools version, which comes with ESXi 6.5, or the latest available version that can be installed on the guests.
Anyway, to find out which VMware Tools version has been shipped with the different ESXi versions/patches, see e.g. https://esxi-patches.v-front.de/vm-6.5.0.html
The latest supported version for the different ESXi versions can be found at VMware Product Interoperability Matrices . However, make sure that you also read the release notes for those versions,, to ensure that your guest OS meets the system requirements, an is supported.
André