extended disk in cfdisk but it will not grow in df -h

i have a VM running ubuntu and extended a disk to 6Tb, i saw the extra space in the cfdisk command and resized it to the max (6t)
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it shows up as 6t in fdisk as well
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but in df -h it will not grow in size and shows up as 223GB
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im not fluent with linux so this is all new, i have tried growpart, resize2fs but none of them make this disk show up as 6t in df -h..

any direction appreciated please!!