We are not able to see the GPU tab in XenCenter. However we are able to run commands like nvidia-smiĀ and xe vgpu-list
Citrix Hypervisor 8.2 Cumulative Update 1 requires a Premium Edition or CVAD license for viewing the vGPU tab
Go to XenCenter -- > Tools-- > License Manager
And apply the proper license
Applied a Standard Edition license or no license which will not provide GPU feature.