Panel 0.13 (to be released in weeks) will provide support for events on the Vega pane.

I would like to be able to provide the same on the Panel VegaFusion pane.

I don't know if this is currently possible with VegaFusion or how?

Inspiration

You can find the typescript implementation of the Vega pane here https://github.com/holoviz/panel/blob/master/panel/models/vega.ts

You can find the development version of the Vega pane docs here describing the event api here https://pyviz-dev.github.io/panel/reference/panes/Vega.html