I think I see the light now.
I understand that :
- bootloader unlocking is a requirement for /e/os installation. At that installation step, there is no risk of phone bricking, given that “Rollback protection errors are IGNORED when the bootloader is UNLOCKED."
- If the bootloader remains unlocked from now on, there’s no more risk of phone bricking. This is my intent: no relocking of the bootloader, given that the evil maid risk treatment option is: accept (I’m a cybersecurity consultant, hence the risk analysis bias ^v^)
- If I relock the bootloader later on, well, I don’t know what, so won’t relock the bootloader.
All in all, I will then proceed to the i/e/os installation.
Thanks a lot, @aibd.