The only reason green arrow realised who Batman is first is cause Batman slipped once and said “talk to me superman” after a mission during a briefing once when everyone was super tired in the exact same tone and jersy accent Brucie would say“keep twalking ollie we need to pass this test” to him when they were in the library in school at 3am.
He just sits there staring into space. Next day he tries to tell himself it was just the exhaustion but inside he knows.
Bruce noticed and inside slapped himself but keeps his composure.