First, you must be unlocked. You can follow the instructions here for making that happen.
If you've already unlocked and installed Magisk, then after installing this ROM you need to reinstall Magisk in TWRP.
Starting with 184.108.40.206, Magisk is always installed.
Beyond that, Magisk and any other addons will be preserved as you flash newer roms.
Thanks to @k4y0z and @xyz` for the unlock.
Changelog and Downloads:
- November 10, 2019 - 220.127.116.11_r1 (md5sum: 8cdc16239df36c8640004232918c5477)
- October 19, 2019 - 18.104.22.168_r1 (md5sum: df8f3d033fddf66a1b4aa3a6b228196b)
- Starting with this version, Magisk will always be installed.
- This includes updated tz firmware to fix LICENSE_ERROR with Prime video.
- October 13, 2019 - 22.214.171.124_r1 (md5sum: bdde0303d8db5495ac6dc2aaf476d2f4)