Are we talking IAE or CFM engines? The difference couldn’t be bigger.
The IAE are small, but have high residual/idle thrust.
CFM engines are larger, but have much less idle power.
You can retard the thrust levers on an IAE A320 at 70 ft no problem, and airspeed will hardly decay. In a tailwind condition there is a pronounced tendency to float.
With CFM engines it is not advisable to retard them higher than say 20 ft, because as soon as they spool down the bus is going to sink like the titanic.