All the below are different portals for configuring the Power Platform and things associated with the Power Platform. Those who are going to break it down by semantics, yes they all have a different purpose with a lot of overlap.
https://admin.microsoft.com/Adminportal/Home?source=applauncher#/homepage
https://us.flow.microsoft.com/
Continue Reading Beth B – MCT, MCSE , MCSA, MSCP’s Article on their blog
https://bethb-d365.com/2020/03/02/who-moved-the-cheese-powerplatform-menus/
Blog Syndicated with Beth B – MCT, MCSE , MCSA, MSCP’s Permission