Hi!
In Affinity Designer to apply effects to text and objets is made via Layer - Layer effects.
In Affinity Photo there is no the same way. Layer effects des not exist. Go to Studio - Effects.
I know that it seems something obvious, but for people that use a lot Affinity Designer could get lost finding a way to do the same effects to a text or/and a object in both applications.
I do not know how this effects are applied in Affinity Publisher but I hope that I buy soon the third application of the suite