We're seeing the following warning in the browser console
PluginDocumentSettingPanel requires a name property. Error Component Stack

Proposed Solution
Update
|
<PluginDocumentSettingPanel |
|
icon="code-standards" |
|
title={__( 'Block X-ray', 'block-xray-attributes' )} |
|
> |
|
<BlockXrayWithSelectedBlock /> |
|
</PluginDocumentSettingPanel> |
to
<PluginDocumentSettingPanel
name="block-xray-attributes"
icon="code-standards"
title={__( 'Block X-ray', 'block-xray-attributes' )}
>
<BlockXrayWithSelectedBlock />
</PluginDocumentSettingPanel>
i.e. add name="block-xray-attributes" to PluginDocumentSettingPanel