Webhook for Audience Leaving Hub/Cancel Membership Trigger (hub.audience.cancelled)

I upgraded to the Higher plan to gain access to the Membership.io WebHooks - But it turns out that although there is a hook for members being ‘removed’ from a hub (as in I go in the back end and remove them), this doesn’t trigger when a user cancels (which is the actual useful trigger).

Can this webhook be added please as it feels like it’s a very important missing feature?

hub.audience.cancelled perhaps? And in which case, do we need one for ‘un-cancelling’? lol - or is that covered by hub.audience.added?

(Even if the Audience Updated also listed their active hubs it would be something :D)

Many thanks

Andy