Why is "Conditional" Missing from the Verbs Section?

Good question! We don't include the condicional conjugation along with all the other verb tenses.

We did add a unit, though, to give you a chance to practice separately: The Conditional Mood

It's quite common/idiomatic in European Portuguese to use the pretérito imperfeito do indicativo in everyday speech in place of the condicional. Also, the condicional is very simple to conjugate, so you generally don't need to spend as much time with it compared to other tenses/moods.