I see this component as a treeview like for example https://www.jstree.com/
SAP also has a nice treeview here https://sap.github.io/ui5-webcomponents/playground/components/Tree/
Would be nice to have a Treeview in Bokeh/ Panel.
There is already a IPytree which should be possible to use in Panel. At least for POCs and exploration.
Personally I hope to implement the Fast treeview one day
and add it to the awesome-panel-extensions package. I’m not sure the Fast treeview has all the functionality you need yet though.