Question regarding use of nosync with LVM mirrors/raid1 resizing

Hello,

I have a script which handles the setup of mirror/raid1 volumes with
LVM. My understanding is that the initial creation of the LV with
nosync is perfectly acceptable if there's no data to sync (In this
case there isn't as we haven't created the filesystem yet). However if
I were to resize these later, suppose I resized the first PV and then
the second and then the LV, would it be fine to set nosync when I
resize the LV as there should be no data used on the new blocks of
either of the resized PVs?