This extension is missing and VkPhysicalDeviceVulkan12Features::bufferDeviceAddress return 0, so I'm wondering if there's a good reason for it.
I'm using Vulkan SDK 22.214.171.124, driver 21.5.2, RX Vega64 and Win7sp1.
I had a peak at gpuinfo.org and I see this extension available on all kinds of GCN devices going back to 2020, so shouldn't I have it?
Can you output the info from: vulkaninfoSDK.exe
Located in: VulkanSDK\126.96.36.199\Bin\vulkaninfoSDK.exe