Yeah, refer to the installation instructions below.Installed the ROM and I am very happy so far! After flashing ROM though, it failed to make a factory reset via stock recovery. Booted anyway. Now regarding root with magisk: is it still needed to boot via volume up to get root access (which means, no access to recovery, unless it is reflashed again)?Thanks.
There's no ramdisk in the boot image for this device. So, as per the Magisk Installation instruction one has to patch Magisk into the recovery image (I used the stock recovery image) and boot into recovery every time to have Magisk reliably.
I'm not 100% sure if the Magisk install zip does this for you or not. So to be safe I followed the instructions and just patched the image and flashed it in bootloader or the new unofficial TWRP.
Refer to the installation instructions here look at the EMUI 9 or higher section, read carefully.