уступить контроль(Occupy an inferior position; allow another to be in control. For example, Linda was content to take a back seat and let Nancy run the meeting. This idiom uses back seat in contrast to the driver's seat, that is, the one in control. Lu4ik)
уйти на задний план(1. if an activity takes a back seat, you spend less time doing that than other things. He's been putting all his energies into house-hunting recently so his studies have had to take a back seat. In my early twenties, politics very much took a back seat to sport and socializing. (sometimes + to) 2. to let other people take a more active and responsible part in an organization or a situation. I was content to take a back seat and let the rest of my family deal with the crisis. CI Alexander Demidov)
