Persona 5 Scramble: The Phantom Strikers has been available in Japan for a good amount of time, but we haven't heard a peep about a localization. While we're still waiting for official word, we do have our first glimmer of hope.
Atlus sent out a survey to Persona 5 Royal players to see what they thought of the game, but also to ask some questions about the series in general. One question in particular asks about interest in buying Persona 5 Scramble: The Phantom Strikers if it were released in the West. I'm guessing the plans are already underway, but Atlus isn't ready to fully unveil things yet.