Hello,
as far I know and checking on the documentation the NFS protocol supported are 3 and 4.1
I checked on the ESXI Host Client and I can see that when you try to mount a NFS share is asking NFS version 3 or 4 ( I think they just left out the 4.1 on the Host Client) but essentially is NFS 4.1 as written on the documentation:
https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.storage.doc/GUID-8A929FE4-1207-4CC5...
Kudos if it was helpful
GioDomi
