Journeys restricted access to Line Manager

Summary:

Although we have tried in restricting the Line manager accessing any Enterprise onboarding or other categories of journeys at display settings and security level , with respect to 'My team' Access level. Still there is provision where he/she can access through 'Me' Assigned journeys and can do edit/delete/force close etc..

Or else there are instances where we have seen one up manager able to see journeys of the below step level people and having ability to do changes possible.

We want to limit access of Line Manager for few journeys not for all..So, it is getting bit tricky here. Open to hear any thoughts/Suggestions on this.