[Windows 10 Mobile] TristanLeBoss:
I'm also done identifying each partition:

"SBL1" is a SBL (Secondary Boot Loader) file with a 80 bytes header

Codeword[4]: d1dc4b84
Magic[4]: 3410d773
Image ID[4]: 15000000 (SBL1_IMG)
Reserved 1[4]: ffffffff
Reserved 2[4]: ffffffff
Image source[4]: 50000000
Image destination pointer[4]: 00c000f8
Image size[4]: f8480400
Code size[4]: f8480400
Signature pointer[4]: f80805f8
Signature size[4]: 00000000
Certificate chain pointer[4]: f80805f8
Certificate chain size[4]: 00000000
OEM root certificate selelected[4]: 01000000
OEM number of root certificates[4]: 01000000
Reserved 5[4]: ffffffff
Reserved 6[4]: ffffffff
Reserved 7[4]: ffffffff
Reserved 8[4]: ffffffff
Reserved 9[4]: ffffffff

"UEFI_BS_NV" is an empty partition

"UEFI_RT_NV" is an empty partition

"UEFI" is an ARM binary file with a 40 bytes header

Image ID[4]: 05000000 (APPSBL_IMG)
Flash partition version[4]: 03000000
Image source[4]: 00000000
Image destination pointer[4]: 00002000
Image size[4]: 00800d00
Code size[4]: 00800d00
Signature pointer[4]: 00802d00
Signature size[4]: 00000000
Certificate chain pointer[4]: 00802d00
Certificate chain size[4]: 00000000

"PADDING0" is an empty partition

"DPP" is a FAT partition

"DBI" is an ARM binary file with a 40 bytes header

Image ID[4]: 1e000000
Flash partition version[4]: 03000000
Image source[4]: 00000000
Image destination pointer[4]: 000080fe
Image size[4]: 982d0000
Code size[4]: 982d0000
Signature pointer[4]: 982d80fe
Signature size[4]: 00000000
Certificate chain pointer[4]: 982d80fe
Certificate chain size[4]: 00000000

"RPM" is an ARM ELF (Executable and Linkable Format) file

Magic[16]: 7f454c46010101000000000000000000
Type[2]: 0200 (ET_EXEC [Executable file])
Machine[2]: 2800 (EM_ARM [Advanced RISC Machines ARM])
Version[4]: 01000000
Entry point address[4]: 91001000
Start of program headers[4]: 34000000
Start of section headers[4]: 00000000
Flags[4]: 02000005
Size of this header[2]: 3400
Size of program headers[2]: 2000
Number of program headers[2]: 0400
Size of section headers[2]: 2800
Number of section headers[2]: 0000
Section header string table index[2]: 0000

"TZ" is an ARM ELF (Executable and Linkable Format) file

Magic[16]: 7f454c46010101000000000000000000
Type[2]: 0200 (ET_EXEC [Executable file])
Machine[2]: 2800 (EM_ARM [Advanced RISC Machines ARM])
Version[4]: 01000000
Entry point address[4]: 000081fe
Start of program headers[4]: 34000000
Start of section headers[4]: 00000000
Flags[4]: 02000005
Size of this header[2]: 3400
Size of program headers[2]: 2000
Number of program headers[2]: 1000
Size of section headers[2]: 2800
Number of section headers[2]: 0000
Section header string table index[2]: 0000

"WINSECAPP" is an ARM ELF (Executable and Linkable Format) file

Magic[16]: 7f454c46010101000000000000000000
Type[2]: 0200 (ET_EXEC [Executable file])
Machine[2]: 2800 (EM_ARM [Advanced RISC Machines ARM])
Version[4]: 01000000
Entry point address[4]: 0090fe07
Start of program headers[4]: 34000000
Start of section headers[4]: 00000000
Flags[4]: 02000005
Size of this header[2]: 3400
Size of program headers[2]: 2000
Number of program headers[2]: 0400
Size of section headers[2]: 2800
Number of section headers[2]: 0000
Section header string table index[2]: 0000

"TZAPPS" is a FAT partition

"BACKUP_TZAPPS" is an empty partition

"MODEM_FS2" is an empty partition

"MODEM_FSC" is an empty partition

"PLAT" is a FAT partition

"EFIESP" is a FAT partition

"MMOS" is a FAT partition

"MainOS" is a NTFS partition
-> Boot sector backup at offset 2566913536 match the boot sector from sector 0

"Data" is a NTFS partition
-> Boot sector backup at offset 7899971072 match the boot sector from sector 0