Xiaomi Redmi 6 PRO - claims uses DM-VERITY - but no vbmeta partition

[stormy1777]

On website: https://twrp.me/xiaomi/xiaomiredmi6pro.html for Redmi 6 PRO, says:

This device uses dm-verity!
This means that swiping to allow system modifications will prevent you from being able to boot if you are using the stock kernel. In order to bypass dm-verity's boot prevention, you will have to install a kernel that has dm-verity disabled in the fstab.

however, the device does not appear to have any vbmeta partition on booted system, or in official ROMs..

/dev/block/platform/soc/7824900.sdhci/by-name # pwd
/dev/block/platform/soc/7824900.sdhci/by-name
/dev/block/platform/soc/7824900.sdhci/by-name # ls -l |wc -l
57
/dev/block/platform/soc/7824900.sdhci/by-name # ls -l meta
ls: meta: No such file or directory