Really guys, you don’t know that different aircraft have different systems that work in different ways?
The NG has AB 1-2-3-Max for landing, RTO for takeoff.
Max can be used whenever it’s needed. Did that recently on a 1600 m runway and 63 T for landing. It uses a fixed retardation so more reverse give less brakes.
RTO is the full monty.
Landing runway 14 in BOM on a wet runway and 60+ tons LW you’ll be stupid not to use max.