In some models configuration the power pins are hidden and automatically connected to the power rails.
It is possible to make them visible, look for the right option in the menus.
Or use Kicad which is open source and has no limitation (1) as Eagle which is a commercial product.
(1)
- No maximum number of component
- multi-sheets (Eagle free only accepts one sheet)
- multi-layer no limitation -> Eagle -free only double side.