In RHEL8 iostat extended output, await is missing

Issue

In RHEL8 iostat extended output, await is missing:

[root@rhel7]# iostat -x
....
Device:         rrqm/s   wrqm/s     r/s     w/s    rkB/s    wkB/s avgrq-sz avgqu-sz   await r_await w_await  svctm  %util
sda               0.00     0.15    0.14    2.42     4.94    73.89    61.49     0.00    0.72    0.26    0.75   0.07   0.02

[root@rhel8]# iostat -x
....
Device            r/s     w/s     rkB/s     wkB/s   rrqm/s   wrqm/s  %rrqm  %wrqm r_await w_await aqu-sz rareq-sz wareq-sz  svctm  %util
sda              0.11    4.76      5.13    275.99     0.00     0.89   0.13  15.79    0.50    0.58   0.00    46.65    57.95   0.36   0.17