I've recently deleted Boot Camp downloads and storage has disappeared
To remove Boot Camp, one is meant to use Boot Camp Assistant which provides an automated workflow for editing the partitions on your disk back to pre-Windows. You may still be able to use it in this state — try opening Boot Camp Assistant and choose Remove Windows if the option exists.

You can partition manually in Disk Utility. Choose Partition, delete NO NAME and resize the APFS container to the rest of the free space on the disk.