How many movies have Misako Akama and Yoko Hikasa collaborated on?

They have worked on 2 movies together! Their first movie together was Magical Girl Lyrical Nanoha: Reflection (2017) while their highest rated movie together was Magical Girl Lyrical Nanoha: Detonation (2018). They have not worked together since Magical Girl Lyrical Nanoha: Detonation (2018).