Hope you are still supporting.
I’ve added these console errors that your plug-in emanates, hope that may be of help:
Using Toolbar without label prop is deprecated since version 5.6. Please use ToolbarGroup component instead. See: https://developer.ww.wp.xz.cn/block-editor/components/toolbar/
wp.components.IconButton is deprecated since version 5.4. Please use wp.components.Button instead.
Using custom components as toolbar controls is deprecated since version 5.6. Please use ToolbarItem, ToolbarButton or ToolbarDropdownMenu components instead. See: https://developer.ww.wp.xz.cn/block-editor/components/toolbar-button/#inside-blockcontrols
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This reply was modified 4 years, 3 months ago by
humanify.
Sorry for the late reply,
The icons should work in the widget area if you update the plugin. It was fixed a while ago.
Kind regards, Joris