IRL Casa Pia have a fully funcional U19 team, yet in game only about 5 or so players appear. Here's a link to the U19 Casa Pia team irl. https://www.zerozero.pt/equipa/casa-pia-ac/6438.
Extent of the U19 Casa Pia in-game. (Missing goalkeeper Afonso Monteiro that I called up to the main squad)