I deleted partition and now I don't see the free space in Disk Utility
Solution 1:
Have you try these steps to fix your issue:
$ diskutil list
It will list your physical drive detail. Note the drive name for unallocated space.
sudo diskutil eraseVolume "Free Space" %noformat% /dev/disk0s3
Assuming your volume is named disk0s3
Next, resize your APFS Container
diskutil apfs resizeContainer disk0s2 0
With value zero at the end, diskutil will automatically claim all available free space.
It should be fine and then you can re-setup macOS from Recovery mode.