Mac loses space after removing bootcamp

Mac Version:

Big Sur, 11.4

I used bootcamp assistant to remove my Windows Bootcamp (80 GB). The space is gone after the removal. I cannot see it in disk utility.

Doing diskutil list in terminal gives:

I can see my 80 GB space listed as "free space" but cannot find a way to merge it into my APFS disk. I have tried

sudo diskutil apfs resizeContainer disk0s2 0

and

diskutil repairvolume disk0s2

in repair mode. Neither works.

Is there anyway to resolve this without backing up and reformatting the entire disk? Much appreciated!