Scouts are very much not religious. They do mention god in the oath, and value a moral guiding force. But it’s up to you if you want to pursue something for your beliefs with your religious community. I don’t recall there ever being anything religious or for a specific religion within scouts itself

Every major belief system dies have a merit badge but you choose to pursue them outside scouting. admittedly nothing specific to atheists, but there’s no reason you need to follow any and most scouts didnt