When I use Magisk, within the app, I click Install, it patches and saves the file, but then if I reboot, I get stuck in a boot loop. I tried to patch the full ROM and boot.img by itself with the same result.
I tried following this guide since I have a Samsung, but Heimdall is not playing nicely. According to the instructions, it is possible to use Odin, but I cannot find instructions on how to do so. boot.img is not a TAR file, so Odin can’t see it.