Does Brian Johnson still sing for AC DC?

Excuse me, I was wondering if you could clarify something for me. I'm a bit out of the loop with the latest news in the music industry. I'm curious to know if Brian Johnson, the legendary lead singer of AC/DC, is still performing with the band? I've heard rumors that he's taken a step back due to health reasons, but I'm not sure if that's true. Could you please shed some light on the current status of Brian Johnson's involvement with AC/DC? Thank you in advance for your help.