Perhaps bot icon hover (as it appears in the workspace)? Designers are always wanting to go make additional changes & flipping back and forth is annoying. Also, it would be nice to run assistant direct from a flow - power automate allow you to run the flow and prompts for inputs.
When editing a project flow there will need to be a way of selecting the assistant you want to test because a single project flow could be used by one or more assistants; unless there's only one assistant.
Should we warn a flow developer when they're editing a project flow not currently being used by any assistants within the tenants - do we know this information?