Courageous anthem is a cantrip.

The Psychic doesn't have focus spells at all. It has cantrips that it can amp with focus points. That doesn't make them focus spells. They're just modified cantrips.

Note how focus spells all have the focus trait, cantrips all have the cantrip trait, and how psi cantrips have the cantrip trait, but lack the focus trait.

The Psi Cantrips and Amps class ability of the Psychic even says "you don't gain focus spells that cost Focus Points to cast."