Free space partion won’t remove after deleting bootcamp partion

So I am using a late 2013 iMac and I tried removing bootcamp by erasing the partion in disk utility after I did that a free space partion was created I tried removin that but kept getting errors so I restored my entire iMac from a Time Machine backup and the same issue still occurred where I couldn’t remove the free space that takes up 3.02 TB on my drive. some please help my Mac is basically unusable if I cannot get the rest of my hard drive space back because of the unremovable “free space”. Im restoring my Time Machine backup right now once more to my iMac so I’ll post pictures of what the problem is. But please any advice for when the restore is done when the issue still persists?