Comment to Installing core apps & Power Apps
V
If you need to have the "Log In" block on your homepage then you need to go to the Studio->Pages->System->Homepage area and add there a new block. In the System tab, choose the "Log In" block and make it visible on for Unauthentificated level. If you mean another problem - plz specify.
isnot the login block exists as part of this home page by default ?
V
No, it isn't added by default because we have the "Log in" link for the guest in the Navigation->System->Toolbar menu area.