@fla I am basing on Ratchanans build so it really wonders me. 🙂
@vincebuntu fear not, none of the alternative OSes can lock a bootloader. Pinephone and Librem 5 don´t even have a lockable bootloader.
The only risk that is has is that someone could access your data in case your phone gets lost or stolen, so better watch out 🙂 - Other than that the locked bootloader has no advantage.