do you now what is init_boot.img and boot.img ? this is 2 different type of file. Your phone use flash boot_ab if you want to flash the boot file and i speak for init_boot witch you can flash it with flash init_boot. Actually i don't understand what exactly you want if you have root. If you want to try SukiSU-Ultra just try it, if you don't want stay in old method for hiding root with Magisk. So The choice is yours. You say in the previous post before:
Is there a reason to switch to susfs?
What is susfs you can read
here This module provides root hiding for KernelSU on the kernel level. So, you say: I have rooted using Magisk using VirusTotal's
What the hell is VirusTotal's and who use this method ? I can't believe it what the people say. The people with less or zero knowledge is better to don't touch nothing. I just gonna leave you to use whatever you want.