I have used retrofit supported twrp available in the second post (sourceforge.net) link, temporarily boot twrp from bootloader then as usual flash the zip. Reboot to system you have root (magisk installed).
I've upgraded from PE12 (unofficial/non-retrofit from @SevralT) to PE13 (official/retrofit).Has someone tested the following upgrade steps (from PixelExperience 12 to this rom?)
Is it working? Should I do another kind of install from PE12 to this ROM?
Yes, exactly, I am with PE12 unofficial and I want to install this one, and I am not sure if I can do it directly following the procedure in the link?