What happens when you delete GUID_Partion_Scheme?

/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *121.3 GB   disk0
   1:                        EFI ⁨EFI⁩                     209.7 MB   disk0s1
   2:                 Apple_APFS ⁨Container disk1⁩         121.1 GB   disk0s2

/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +121.1 GB   disk1
                                 Physical Store disk0s2
   1:                APFS Volume ⁨Macintosh HD - Data⁩     67.6 GB    disk1s1
   2:                APFS Volume ⁨Preboot⁩                 408.1 MB   disk1s2
   3:                APFS Volume ⁨Recovery⁩                622.8 MB   disk1s3
   4:                APFS Volume ⁨VM⁩                      4.3 GB     disk1s4
   5:                APFS Volume ⁨Macintosh HD⁩            22.1 GB    disk1s5
   6:              APFS Snapshot ⁨com.apple.os.update-...⁩ 22.1 GB    disk1s5s1

GUID_partition_scheme is the human-readable label for the GUID Partition Table (GPT) that resides near the beginning of your disk and describes the physical partitions contained within it. Deleting it would cause the entirety of all data on your drive to no longer be accessible without recovery tools. macOS will see an uninitialized disk and ask if you would like to format it.