Damaged partition table on drive contains NTFS and encrypted-HFS partition

Question

My Mac was mounting my 500GB external drive HFS partition as read-only and NTFS partition as read-write. I tried to fix HFS partition regenerated partition table with GPT. Now I just have EFI partition mountable contains firmware, bootcode etc.

Just want to know if I can fix/regenerate partition map/MBR.

Informations (In last status/External driveis mounted as disk2):

diskutil list:

Eray-MacBook-Pro:~ Eray$ diskutil list
/dev/disk0 (internal, physical):
#:                       TYPE NAME                    SIZE       
IDENTIFIER
0:      GUID_partition_scheme                        *120.0 GB   
 disk0
1:                        EFI EFI                     209.7 MB   
disk0s1
2:                 Apple_APFS Container disk1         119.8 GB   
disk0s2

/dev/disk1 (synthesized):
#:                       TYPE NAME                    SIZE       
IDENTIFIER
0:      APFS Container Scheme -                      +119.8 GB   
disk1
                             Physical Store disk0s2
1:                APFS Volume Eray SSD                96.8 GB    
disk1s1
2:                APFS Volume Preboot                 21.3 MB    
disk1s2
3:                APFS Volume Recovery                517.8 MB   
disk1s3
4:                APFS Volume VM                      1.1 GB     
disk1s4

/dev/disk2 (external, physical):
#:                       TYPE NAME                    SIZE       
IDENTIFIER
0:      GUID_partition_scheme                        *500.1 GB   
disk2
1:                        EFI EFI                     209.7 MB   
disk2s1

sudo gpt -r -vv show /dev/disk2:

Eray-MacBook-Pro:~ Eray$ sudo gpt -r -vv show /dev/disk2
Password:
gpt show: /dev/disk2: mediasize=500107860480; sectorsize=512; 
blocks=976773165
gpt show: /dev/disk2: PMBR at sector 0
gpt show: /dev/disk2: Pri GPT at sector 1
gpt show: /dev/disk2: Sec GPT at sector 976773164
  start       size  index  contents
      0          1         PMBR
      1          1         Pri GPT header
      2         32         Pri GPT table
     34          6         
     40     409600      1  GPT part - C12A7328-F81F-11D2-BA4B- 
00A0C93EC93B
 409640  976363492         
  976773132         32         Sec GPT table
   976773164          1         Sec GPT header

I wonder if Mac has a solution to fix/regenerate partition map or any way to fix drive.

Thank you much.