The Global 5000 has a similar feature. From the FCOM:
”The EEC modulates engine power with maximum reverse thrust selected. A maximum of 70% N1 is available above 65 knots. Engine power is linearly reduced to a maximum of 50% N1 at 50 knots and below.”
It doesn’t say whether it’s ground speed or airspeed. Probably ground speed. There is no name given for this feature.