This is expected behavior.
This 'EVC Mode' is visible on all powered on VMs from vSphere 6.7, whether or not the VMs are in a cluster with a configured EVC baseline, and whether or not the VMs have per-VM-EVC mode configured. The 'EVC Mode' is reporting what CPU features are exposed to the Guest operating system, and the minimum CPU instruction set needed for vMotion.
The EVC setting that is shown when a VM is powered on is what EVC mode is the minimum the VM can enter.
Examples :