Can't reclaim disk space on MacOS Mojave

Hi, I had my drive partitioned so I could use Windows. When trying to increase space on the Windows partition and messing about with the partitions, I managed to delete 285gb which I think was the Mac partition, so of the 500gb only 215gb is able to be used and shows as available space.

Here's what diskutil list shows in terminal:

On Disk Drill it shows unallocated space:

I had to reinstall Mac OS again by the way, I think I deleted the entire Mac part of the drive but I still don't know why I can't get the rest of the space.

I haven't set up bootcamp again - do I need to do so to reclaim the unallocated space?

Thanks