Do large Airliners use full thrust when reversers are deployed? Do large and heavy Airliners, Jumbos and Super Jumbos wide bodies included use full thrust for braking when reversers are deployed?  What is the thrust setting?
Flight manual procedures and operators‘ policies notwithstanding, they would typically use full reverse thrust when the stopping performance requires so, and idle reverse thrust when not. The latter setting means less wear on the engines and lower noise. The former setting overrides these considerations when safety demands it.