He had intended to duck out before being noticed, but when she catches him at it, his expression softens considerably and he waves back. Frank hadn't wanted to bother her, but if she's already done he'll wait in the hall for her to emerge. He tells Max to sit and does a few mag-lock tests with him while they wait, which are going smoother all the time. It's actually been a few days since he saw Kamala, and now that he's whole again at least they can have a real conversation. He owes her a real thank you for everything she's done for him.