//位置
thisComp.layer(index-1).position.valueAtTime(time-0.5)

//スケール
thisComp.layer(index-1).scale.valueAtTime(time-0.5)

//回転
thisComp.layer(index-1).rotation.valueAtTime(time-0.5)

//透明度
thisComp.layer(index-1).opacity.valueAtTime(time-0.5)

//ヌルも行ける
thisComp.layer("Null 1").opacity.valueAtTime(time-0.5)

概要

パラメータ

追従

thisComp.layer("Layer").transform.position.valueAtTime(time-1)

時刻固定

thisComp.layer("Layer").transform.position.valueAtTime(0)

一つ上のレイヤーの位置に、0.5秒後に追従する

thisComp.layer(index-1).position.valueAtTime(time-0.5)

参考： https://x.com/aecolorcodenet/status/1883653351155568988