Ability to bulk assign groups in space permission for eg site-admin/product admin

Currently per Assign space permissions

• There's no way to change permissions for multiple spaces at once. However, if you're a Confluence admin or a site admin, you can set default space permissions, which will apply to all new spaces.

Suggestion
It would a great benefit for our site-admins/product admins if they can get flexibility to add group in bulk for multiple spaces with in space permissions.