How to root the Fairphone 3?

[AnotherElk]

@dupdup

After installing Magisk and locking the phone again something went wrong

No, this already is what went wrong. Don’t lock the bootloader.

I bricked my FP3 and i hated it

Just for information : I explained here, step by step, how to root /e/ (no need of twrp). Of course, as many already said that, leaving the bootloader unlocked is essential.

I bricked my FP3 and i hated it

Installing Magisk also modifies the boot.img so locking the phone with Magisk installed will have the same effect.