Around the time Billy finished Natalie's armor and was halfway through finishing Kate's, his armor was already fully charged and ready to deploy. During that week, he had many ideas, like trying to find a way for the armors to move toward them by themselves once they do something specific. Or create an automatic working function that would make the armor operate by itself and do some simple tasks. However, implementing all of those would take the time that wasn't something that he had a lot right now.
"I suppose I can wait a few days more and finish Kate and Sarah's armor," Billy thought. "Icarus and Lucyna's report aren't mentioning anything, after all."
Although they weren't that specific yet, Icarus was using their communication device to send data and drawings of the creatures and demi-humans they found. So, Billy didn't need to gather more intel for the time being.