[Essential Phone Questions & Answers] hellgod12:
I can see all the partitions on a working phone:

ls -al /dev/block/platform/soc/1da4000.ufshc/by-name

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 abl_a -> /dev/block/sde9

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 abl_b -> /dev/block/sde26

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 apdp -> /dev/block/sde39

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 bluetooth_a -> /dev/block/sde6

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 bluetooth_b -> /dev/block/sde23

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 boot_a -> /dev/block/sde11

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 boot_b -> /dev/block/sde28

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 box -> /dev/block/sda10

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 bspdata -> /dev/block/sda1

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 cdt -> /dev/block/sdd1

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 cmnlib64_a -> /dev/block/sde13

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 cmnlib64_b -> /dev/block/sde30

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 cmnlib_a -> /dev/block/sde12

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 cmnlib_b -> /dev/block/sde29

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 ddr -> /dev/block/sdd2

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 devcfg_a -> /dev/block/sde14

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 devcfg_b -> /dev/block/sde31

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 devinfo -> /dev/block/sde37

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 dip -> /dev/block/sde38

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 dpo -> /dev/block/sde41

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 dsp_a -> /dev/block/sde15

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 dsp_b -> /dev/block/sde32

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 frp -> /dev/block/sda7

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 fsc -> /dev/block/sdf3

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 fsg -> /dev/block/sde35

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 ftmboot -> /dev/block/sda12

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 ftmdata -> /dev/block/sda14

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 ftmsys -> /dev/block/sda13

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 hyp_a -> /dev/block/sde3

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 hyp_b -> /dev/block/sde20

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 keymaster_a -> /dev/block/sde10

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 keymaster_b -> /dev/block/sde27

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 keystore -> /dev/block/sda6

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 limits -> /dev/block/sde43

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 logbk -> /dev/block/sda11

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 logfs -> /dev/block/sde45

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 mdtp_a -> /dev/block/sde8

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 mdtp_b -> /dev/block/sde25

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 mdtpsecapp_a -> /dev/block/sde7

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 mdtpsecapp_b -> /dev/block/sde24

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 misc -> /dev/block/sda5

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 modem_a -> /dev/block/sde5

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 modem_b -> /dev/block/sde22

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 modemst1 -> /dev/block/sdf1

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 modemst2 -> /dev/block/sdf2

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 msadp -> /dev/block/sde40

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 nvcust -> /dev/block/sde48

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 nvdef_a -> /dev/block/sde16

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 nvdef_b -> /dev/block/sde33

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 nvrf -> /dev/block/sda2

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 persist -> /dev/block/sda4

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 pmic_a -> /dev/block/sde4

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 pmic_b -> /dev/block/sde21

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 raw -> /dev/block/sda15

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 rpm_a -> /dev/block/sde1

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 rpm_b -> /dev/block/sde18

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 sec -> /dev/block/sde36

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 splash -> /dev/block/sde42

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 ssd -> /dev/block/sda3

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 sti -> /dev/block/sde46

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 storsec -> /dev/block/sde47

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 system_a -> /dev/block/sda8

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 system_b -> /dev/block/sda9

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 toolsfv -> /dev/block/sde44

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 tz_a -> /dev/block/sde2

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 tz_b -> /dev/block/sde19

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 userdata -> /dev/block/sda16

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 vendor_a -> /dev/block/sde17

lrwxrwxrwx 1 root root 16 1970-01-01 19:11 vendor_b -> /dev/block/sde34

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 xbl_a -> /dev/block/sdb1

lrwxrwxrwx 1 root root 15 1970-01-01 19:11 xbl_b -> /dev/block/sdc1

Any ideas where to look?