[Samsung Galaxy Tab S5e Questions & Answers] lawofone:
Good news everyone! o.o My SM-T727A is now running LineageOS! Here are the step by step instructions:

PLEASE NOTE: After the whole process is complete, my tablet states it's an SM-T725 in the Android About screen because you need to flash the US Cellular firmware as a workaround to unlock the bootloader. Also, when restarting the tablet, a screen appears that states "This tablet's bootloader is unlocked and its software integrity can't be verified." Then another screen states "The tablet is not running Samsung's official software." Then the LineageOS splash screen appears and the system loads. :) The information below is provided for your informational purposes only. Proceed at your own risk.

DOWNLOAD US CELLULAR FIRMWARE

FLASH FIRMWARE

UNLOCK THE BOOTLOADER

FLASH LINEAGEOS

DOWNLOAD US CELLULAR FIRMWARE

Download Frija at https://xdaforums.com/t/tool-frija-samsung-firmware-downloader-checker.3910594/

Extract the zip file.

Open Frija.exe as an administrator.

Enter the following information into the program:

Click check update.

Click download and save.

My Frija downloaded: SM-T727R4_2_20211029161118_ijtwqlgpl4_fac.zip.enc4

FLASH FIRMWARE

Download a patched version of Odin at https://xdaforums.com/t/patched-odin-3-13-1.3762572/

I downloaded "Odin3 v3.14.1_3B_PatcheD.zip".

Extract the zip file.

Open "Odin3 v3.14.1_3B_PatcheD.exe" as an administrator.

Power off the tablet and boot it into download mode: with the tablet powered off, hold Volume up + Volume Down + Power. At the prompt, click the button that on the onscreen instructions that correlates to “Continue.”

Download and install the newest Samsung drivers "SAMSUNG_USB_Driver_for_Mobile_Phones.exe" from https://developer.samsung.com/android-usb-driver

Connect the tablet to your computer using a USB cable. It should appear in Odin above where it says "ID:COM" as something like "0:[COM3]" or "COM0".

Load the BL, AP, CP, and HOME_CSC files from the US Cellular firmware folder that you extracted into their respective places in Odin. Ignore the other "CSC_..." file.

Click start. A progress bar should appear at the bottom of your tablet screen.

WAIT until Odin displays PASS! on the top left and "All threads completed." in the log.

Your tablet will restart automatically and show the US Cellular logo.

UNLOCK THE BOOTLOADER

Go through setup wizard inputting the minimal amount necessary, skipping as many things as you can but do connect to a Wi-Fi network during setup. This allows the tablet to adjust the date/time automatically.

Once at the Android home screen (YAYY!), go to Settings (swipe down from the very top and hit the gear icon) > About Tablet > Software information.

Tap on "Build number" until Developer options is activated.

Go to Settings > Developer options.

Tap on the switch next to "OEM unlocking" and tap "Turn on" at the prompt.

Tap on the switch next to "USB debugging" and tap "OK" at the prompt.

FLASH LINEAGEOS

Continue with the instructions on the LineageOS site after the "OEM unlock" step.

Install LineageOS on gts4lv | LineageOS Wiki

wiki.lineageos.org

Thank you purplerose1414, Wieczorkiewicz and everyone on this thread for your help.