well i cant unlock it, otherwise id do it for sure.a locked bootloader checks if the phone is loading a stock rom (or very close to stock). if the rom is not issued by the vendor, the phone does not boot. this is true for all phones as far as i know, thus, in order to load another rom you have to unlock the bootloader - if the vendor allows for that.
more info and instructions to unlock your bootloader can be found here:
thanks for the answer, i guess i need to research more on how it all works, getting twrp and root to work made me believe almost anything will be possible, but it seems its rather useless. especially since i cant really get magisk to work any way and twrp is installed in the system partition which leads to safetynet failing no matter what i do. well ****
its just a bit weird to me in general as a linux guy to know that i have root access but i cant access all partitions, especially not the bootloader, how is there no way to alter it? but thats another question, maybe someday ill take a deep dive
one thing though, i guess its possible to at least install a nougat based rom, since there was a nougat preview firmware from sony somewhere around.