You can still have FRP with an unlockable bootloader. Just place the unlock bootloader button after the forced Google login so that even if you factory reset th

You can still have FRP with an unlockable bootloader. Just place the unlock bootloader button after the forced Google login so that even if you factory reset the phone you cannot unlock the bootloader without the Google account. In fact that is how most phones (that still have an unlockable bootloader) do it, the button is in the developer options which if you reset the phone you cannot get to without having access to the linked Google account.