Errors when checking memory bank index using "xbutil examine --report memory" command

The XRT native API documentation says we can use xbutil examine --report memory command to check the memory bank index. But I always got errors.

First I was asked to use --device to specify device. This is easy to solve. So the command now becomes

xbutil examine --report memory -d 0000:3b:00.1

But when I run this command, the first problem I encountered is that there is no information related to memory bank index. Only platform name was returned:

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[0000:3b:00.1] : xilinx_u280_gen3x16_xdma_base_1
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I have no idea how to fix these errors and I want to get the memory bank index using xbutil examine --report memory command as the document suggests, especially those related to HBM. Can you please lend me a hand? Thank you.

I am using Alveo U280 accelerator card on Ubuntu 22.04. The XRT version is 2.15.228 (released on 2023-06-13).

Start with the linked XRT native API documentation and reproduce xbutil examine --report memory -d 0000:3b:00.1 on the reported U280, Ubuntu 22.04, and XRT 2.15 setup. Compare the documented behavior with the command output, then determine whether the documentation or the command needs correction and verify the expected HBM memory-bank information.