My (limited) understanding of it says no. The bootloader can only be locked and unlocked with keys derived from Motorola. So to lock the bootloader would make it so that future OS upgrades can’t be loaded. If your concern is security, your content is encrypted.
Unfortunately, no. I’m running LineageOS on a Motorola device and the support docs state that there’s nothing that can be done about this once its unlocked.
My (limited) understanding of it says no. The bootloader can only be locked and unlocked with keys derived from Motorola. So to lock the bootloader would make it so that future OS upgrades can’t be loaded. If your concern is security, your content is encrypted.