We don't have synonyms for back seating yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are back bearing, back testing and bark eating.
(n) :
(informal, especially in the expression take a back seat) A lesser or inferior position; a position of deliberate noninvolvement, in which decision-making or leadership is left to others.
(n) :
(informal, especially in the expression take a back seat) A lesser or inferior position; a position of deliberate noninvolvement, in which decision-making or leadership is left to others.