@FlorianC How many products do you have? May be able to rig up some workaround by creating a deal naming convention, then you can send out the closed won deal notification and the managers could review it to know if it’s theirs. Obviously, not the ideal way to get there but it could achieve what you’re looking for.
The best option is for Hubspot to add it into deal workflows. The workflows are relatively new so I suggest posting it on the idea board for future iterations.