Why isn't there the constraints panel?

Hey ! Making a status bar, I put the the 3 icons on the right together in a AL frame, and then this frame in an other AL frame with the hour on the right. I would like to constraint those icons on the left and on the right side of the screen, but the icons don’t have any constraints panel available… Why that ?

The icons are constrained by the frame since it’s using auto layout. If you click the dots on the auto layout panel, you’ll see additional settings that you can play around with. Setting spacing mode to space between is a neat way to push icons to the far edges.