After size change with cfdisk /dev/sdX to the right size, even after reboot size on disk was correct, but GUI size was still original size.
After running resize2fs /dev/sdX it mentions: on-line resizing required
Then the system recognized the changes.
Thanks anyways - SOLVED :)
Issue:
Resize Boot volume of PVE
Original size +/- 109GB
New Size: 575G
Linux recognizes the change as in images attached below
PVE GUI only recognizes original size
System doesn't seem to rescan at boot. Numerous restarts size remains the same.
CPU usage 0.31% of 24 CPU(s)
IO delay...