Yes. Or addonsu from download/extras
ETA's are never provided by the Lineage Team for a good reason.
Does the add-on match your ROM?
No match! 14.1 Rom needs 14.1 addon!I assume so as Titanium works. It's addonsu-15.1-arm-signed.zip (newest ARM32 on the wabsite) on an HTC E8 using Lineage 14.1 from here https://forum.xda-developers.com/showpost.php?p=76598306&postcount=50
I also uploaded it here.
If anyone is in search of the first/original releases, of the LineageOS Addon-SU files, I still have them all archived on my File Host Account here:
SuperSU is a closed-source, proprietary superuser solution, and the other is LineageOS provided solution. There are other options as well, such as PHH Superuser. Choose one, they all essentially do the same thing.