877 votesthinking about it · AdminMicrosoft 365 Groups Feedback (Product Owner, Microsoft Office 365) responded
Following up on the previous update, if a workload (such as Planner) is enabled for Outlook by default, we don’t plan on hiding those groups from the GAL. The only other scenario currently under consideration where we would hide groups by default is “Secret Groups”. “Secret Groups” would be hidden from everywhere unless you are a member. “Secret groups” is on the Microsoft 365 Groups backlog, but there is no delivery date available at this time.
An error occurred while saving the commentYannick commented
I asked Christophe Fiessinger (Office 365 Program Manager) about this, and he told me it's still on the backlog but not something they have prioritized.