Is it possible re-lock Pixel 7 (Panther) after OS install?

I have a Pixel 7/(Panther). I noticed that CalyxOS locks the bootloader after their install. Can the bootlocker be re-locked after installing any cuatom ROM?

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Not only CalyxOS, but also other CustomROM Android distributions offer the “relocking bootloader” feature for the Google Pixel 7 (panther). However, /e/ does not (yet) (nor does LineageOS 21.0) - at least according to /e/ documentation, because unlike the Google Pixel 5 (redfin), no avb custom key is provided there.

Locking Bootloader redfin

As long as /e/ does not officially release the relocking of the bootloader, I avoid any bootloader relock attempt in order not to provoke device bricking.

No! This feature is only available on a few Android devices and also depends on the CustomROM used.

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