[Sprint Samsung Galaxy Note 8 Questions & Answers] toviaheli:
So I found this website that has a procedure for Rooting the Note 8 running Android Pie.

It does not list what variant of the Note 8 this will work with (EDIT: this root is for the 950F, and the relevant file has been taken down)

Has anyone tried this process?

Original Article Link: https://techbeasts.com/root-galaxy-note-8-android-pie-install-twrp/

Relevant Text from the page:

"Preparations to Root Galaxy Note 8 and install TWRP

This guide is only for Galaxy Note 8 running Android Pie. Check your phone’s details under Settings > About phone section.

You need an External MicroSD card to root the phone.

Charge your phone’s battery up to 50% to avoid power loss.

Back up all of your messages, call logs, and contacts. This process may wipe your phone.

Enable OEM Unlocking and USB Debugging Mode from Developer Options.

Use the original data cable to connect Note 8 to the computer.

Follow the remaining steps with full attention.

Required Downloads

TWRP Recovery for Galaxy Note 8: twrp-3.2.3-0-greatlte.img.tar

Magisk + OEM Issue Fix File for Note 8: Magisk +N950F_PIE_DS_N_PIE_Root_for_OEM_issue_devices_V5.zip

Copy the Magisk OEM issue.zip file to your External SD Card.

Odin 3.13.1 to Root Note 8: Download Odin 3.13.1

Extract to get Odin3.exe file.

How to Root Galaxy Note 8 on Android Pie and Install TWRP

Open Odin3.exe and add the TWRP Recovery.img.tar file. First of all, open Odin.exe on your computer. In Odin, click on the AP tab and select the TWRP.img.tar file. Now go to Options tab in Odin. Make sure that the only option checked is “F.Reset.Time”. All other options should be UNCHECKED.

Boot your Galaxy Note 8 in Download Mode. Power down your Galaxy Note 8. Now press and hold Volume Down + Home + Bixby buttons simultaneously to boot up. As your phone shows a warning, press Volume Up to continue.

Connect Note 8 to the computer and flash TWRP. Now connect your phone to the computer. As Odin shows a Blue light in the ID:COM box and “Added” in the log box, click Start. This will flash TWRP. After TWPR flashing ends, DO NOT REBOOT your phone. Disconnect it.

Reboot your Galaxy Note 8 into the TWRP Recovery to format it. After disconnecting your phone, press and hold Volume Up + Bixby + Power button for a while to boot into the TWRP Recovery. TWRP will now ask if you want to allow modifications. Swipe the screen and go ahead. Now in TWRP, click on Wipe > Format Data. This will wipe the data from your phone.

Reboot into Recovery again, flash Magisk. Now go back to main menu in TWRP. Click on Reboot > Recovery. As your Note 8 reboots into the recovery, click on Install > Install Zip > Choose the OEM Fix Magisk.zip file from the external SD card. flash the file.

All done. Reboot into the System now. After flashing the file, go back to the main menu again and tap Reboot > System. This will reboot your phone into the system now. You will have the Note 8 rooted with TWRP installed. That’s all. Enjoy!

This is how the TWRP looks like. Don’t have an SD card? Here’s what to do

In case you do not own an SD card, you can skip copying files to the external sd card. Follow all the steps from Step 1 to Step 4. After step 4 when your phone is in the TWRP recovery, connect it to the computer. As the mount is working now, you can copy the OEM Issue Fix file directly to your Note 8. Just copy the file, disconnect the phone and follow step 5 and 6.

Wrap Up

Thanks to our friend Dr.Ketan for developing the OEM Fix + Magisk file."

Dr. Ketan's original XDA thread:

https://xdaforums.com/galaxy-note-8/how-to/guide-how-to-root-note8-efs-backup-t3677038