sharepoint online – SPFX List View Command Set Extension Sub Menu


Is it possible to add your own Sub-Menus when creating a List View Command Set Extension in the SharePoint Framework?

I would like to have something like:

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I think it would be easily achievable if the IListViewCommandSetExecuteEventParameters event gave us access to the DOM element.

This was possible using JavaScript in older versions of SharePoint.
Using methods like this: https://weblogs.asp.net/jan/customizing-the-sharepoint-ecb-with-javascript-part-2