Question Realme 9 Pro 5G

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Uhh I wanted to root my phone, so i tried kingroot, but OS says "app banned". I tried magisk, but theres no option of downloading my phones boot.img. I used fastboot to try getting boot.img but it dont want do it (every command i tried not worked). I tried booting twrp from fastboot, but it cant write beacuse my bootloader is not unlocked. So i need help with unlocking it. By the way i have Realme UI 4.0 and i think i need 3.0 for unlocking, but i can't find any tutorial for my phone.
My current version of my phones OS is RMX3472_11_C.16