Merging two partitions on external hard drive
I have read solutions to this problem, but nothing seems to work. I want to format the entire disk, but it shows up as two separate disks in Disk Utility. Apparently, the drive has no name and/or isn't recognized as a single entity/physical drive. How do I get DU to see it as an external drive with 2 partitions rather than 2 separate drives?
iMac 21.5″, macOS 13.1