You’re the best 
That worked 
Thank you so much to you and the whole Sailfish community.
./spd_dump exec_addr 0x65015f08 fdl fdl1-dl.bin 0x65000800 fdl fdl2-dl.bin 0x9efffe00 exec w uboot_a fdl2-dl.bin w uboot_b lk.bin
branch:main, sha1:86fa3e31bc6ab9bd92eeaf48aa63bbfc7e065485
Successfully connected to port: 5
CHECK_BAUD bootrom
BSL_REP_VER: "SPRD3\0"
CMD_CONNECT bootrom
current exec_addr is 0x65015f08
SEND fdl1-dl.bin to 0x65000800
SEND custom_exec_no_verify_65015f08.bin to 0x65015f08
EXEC FDL1
CHECK_BAUD FAIL
CHECK_BAUD FDL1
BSL_REP_VER: "Spreadtrum Boot Block version 1.1\0"
CMD_CONNECT FDL1
CHANGE_BAUD FDL1 to 921600
KEEP_CHARGE FDL1
SEND fdl2-dl.bin to 0x9efffe00
FDL2: incompatible partition
EXEC FDL2
DISABLE_TRANSCODE
ENABLE_WRITE_RAW_DATA
Reading Partition List
[===== ] 12.5%
[========== ] 25.0%
[=============== ] 37.5%
[==================== ] 50.0%
[========================= ] 62.5%
[============================== ] 75.0%
[=================================== ] 87.5%
[========================================] 100.0%
Read Part Done: user_partition+0x0, target: 0x8000, read: 0x8000
0 splloader 256KB
1 prodnv 64MB
2 miscdata 1MB
3 misc 1MB
4 trustos_a 6MB
5 trustos_b 6MB
6 sml_a 1MB
7 sml_b 1MB
8 uboot_a 3MB
9 uboot_b 3MB
10 uboot_log 16MB
11 logo 8MB
12 fbootlogo 8MB
13 l_fixnv1_a 2MB
14 l_fixnv2_a 2MB
15 l_fixnv1_b 2MB
16 l_fixnv2_b 2MB
17 l_runtimenv1 2MB
18 l_runtimenv2 2MB
19 persist 2MB
20 l_modem_a 25MB
21 l_modem_b 25MB
22 l_deltanv_a 1MB
23 l_deltanv_b 1MB
24 l_gdsp_a 10MB
25 l_gdsp_b 10MB
26 l_ldsp_a 20MB
27 l_ldsp_b 20MB
28 l_agdsp_a 6MB
29 l_agdsp_b 6MB
30 pm_sys_a 1MB
31 pm_sys_b 1MB
32 teecfg_a 1MB
33 teecfg_b 1MB
34 hypervsior_a 10MB
35 hypervsior_b 10MB
36 boot_a 64MB
37 boot_b 64MB
38 vendor_boot_a 100MB
39 vendor_boot_b 100MB
40 init_boot_a 8MB
41 init_boot_b 8MB
42 dtb_a 8MB
43 dtb_b 8MB
44 dtbo_a 8MB
45 dtbo_b 8MB
46 super 6148MB
47 cache 64MB
48 blackbox 500MB
49 vbmeta_a 1MB
50 vbmeta_b 1MB
51 metadata 64MB
52 sysdumpdb 10MB
53 vbmeta_system_a 1MB
54 vbmeta_system_b 1MB
55 vbmeta_vendor_a 1MB
56 vbmeta_vendor_b 1MB
57 vbmeta_system_ext_a 1MB
58 vbmeta_system_ext_b 1MB
59 vbmeta_product_a 1MB
60 vbmeta_product_b 1MB
61 vbmeta_odm_a 1MB
62 vbmeta_odm_b 1MB
63 avbmeta_rs_a 1MB
64 avbmeta_rs_b 1MB
65 common_rs1_a 8MB
66 common_rs1_b 8MB
67 common_rs2_a 16MB
68 common_rs2_b 16MB
69 calinv 2MB
70 userdata 114523MB
standard gpt table saved to pgpt.bin
skip saving sprd partition list packet
partition list saved to partition_1738258677.xml
Total number of partitions: 70
Storage is ufs
Device is using slot a
file size : 0x1034d8
[========================================] 100.0%
Write Part Done: uboot_a, target: 0x1034d8, written: 0x1034d8
file size : 0xfd9c8
[========================================] 100.0%
Write Part Done: uboot_b, target: 0xfd9c8, written: 0xfd9c8
FDL2 >
PS: I forgot to change the lk.bin at the end to fdl2-dl.bin, but it seems to work this way for now.