[Google Pixel ROMs, Kernels, Recoveries, & Other De] FernBch:
Hopefully this info is not "useless clutter". I ran the below in Terminal Emulator and have a list of partitions for both slot A and B. You can see which partitions are "slot specific" and which are not (possible shared?).

May have a better list here:

sailfish:/ $ su

sailfish:/ # ls -l /dev/block/platform/soc/624000.ufshc/by-name/

total 0

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 aboot_a -> /dev/block/sda17

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 aboot_b -> /dev/block/sda18

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 apdp_a -> /dev/block/sda29

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 apdp_b -> /dev/block/sda30

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 board_info -> /dev/block/sdf1

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 boot_a -> /dev/block/sda19

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 boot_b -> /dev/block/sda20

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 bootlocker_a -> /dev/block/sda1

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 bootlocker_b -> /dev/block/sda2

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 cdt -> /dev/block/sdd12

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 cmnlib32_a -> /dev/block/sda13

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 cmnlib32_b -> /dev/block/sda14

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 cmnlib64_a -> /dev/block/sda15

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 cmnlib64_b -> /dev/block/sda16

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 ddr -> /dev/block/sdd11

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 devcfg_a -> /dev/block/sda23

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 devcfg_b -> /dev/block/sda24

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 devinfo -> /dev/block/sdf4

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 devinfobak -> /dev/block/sdd5

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 dip -> /dev/block/sdd7

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 dpo -> /dev/block/sdd6

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 frp -> /dev/block/sde1

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 fsc -> /dev/block/sdd8

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 fsg -> /dev/block/sdf3

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 hosd_a -> /dev/block/sda21

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 hosd_b -> /dev/block/sda22

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 hyp_a -> /dev/block/sda11

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 hyp_b -> /dev/block/sda12

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 keymaster_a -> /dev/block/sda3

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 keymaster_b -> /dev/block/sda4

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 metadata -> /dev/block/sde5

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 mfg -> /dev/block/sdf2

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 misc -> /dev/block/sdd1

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 modem_a -> /dev/block/sda25

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 modem_b -> /dev/block/sda26

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 modemst1 -> /dev/block/sdd9

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 modemst2 -> /dev/block/sdd10

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 msadp_a -> /dev/block/sda27

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 msadp_b -> /dev/block/sda28

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 persist -> /dev/block/sdd3

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 pg1fs -> /dev/block/sde3

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 pg2fs -> /dev/block/sde4

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 pmic_a -> /dev/block/sda9

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 pmic_b -> /dev/block/sda10

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 ramdump -> /dev/block/sde2

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 reserve0 -> /dev/block/sda36

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 reserve3 -> /dev/block/sdd13

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 reserve4 -> /dev/block/sde6

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 reserve5 -> /dev/block/sdf5

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 rpm_a -> /dev/block/sda7

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 rpm_b -> /dev/block/sda8

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 sec -> /dev/block/sdd4

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 ssd -> /dev/block/sdd2

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 system_a -> /dev/block/sda33

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 system_b -> /dev/block/sda34

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 tz_a -> /dev/block/sda5

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 tz_b -> /dev/block/sda6

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 userdata -> /dev/block/sda35

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 vendor_a -> /dev/block/sda31

lrwxrwxrwx 1 root root 16 1970-04-02 19:01 vendor_b -> /dev/block/sda32

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 xbl_a -> /dev/block/sdb1

lrwxrwxrwx 1 root root 15 1970-04-02 19:01 xbl_b -> /dev/block/sdc1

sailfish:/ #