Currently Ideas overview page show pie chart with status field, it would be good if it can be customizable on custom field
Thank you for your idea. This is currently possible using custom charts. Charts can be created using any field needed, including custom fields. This article explains in more detail. This is not included in the ideas overview page, but can be shared via presentations where you could also combine other Aha! views as needed onto a slide to create a similar overview.
Given the current capabilities, we are unlikely to implement this idea at this time. We hope you can understand.