Hi @schwimmlehrer,
Actually you can do this already with the Public Pages for Locations [PRO] feature. You find this under Settings > Open User Map > Advanced.
This enables single pages with a comment option. However – you’ll have to take care of the template then.
Another option would be to use the new WordPress hook that is available to modify the output of the location bubble itself. With a bit of coding skills you should be able to integrate a comment function there. I’ve written a Knowledge Base article on how to work with the hook.
Best Regards,
Daniel