Counter to show air interface delay

A question towards Ericsson Folks,
Do you know a counter to show air interface delay?

Scheduling a packet from MAC until reception of ACK or NACK.
There is counters for latency but they are scheduling latency.
For RLC I have for example time between DR packet arrived and it completely drained from RLC Or for PDCH it arrived to enb and scheduled in air.

Maybe this one works for you my friend:


Aggregated time for the downlink MAC delay measure.