@Manoj Since I do not see the Samsung Galaxy S6 Edge (Zeroltexx) in the list yet, I’d like to draw your attention to the fact that altough LineageOS dropped support for this device, there is an unofficial 17.1 build by developper enesuzun2002 https://github.com/enesuzun2002/lineageos-ota/releases which seems to be working quite well according to @archje as mentionned in this reply :
And yes, my S6 Edge does not run smoothly with /e/ OS n(ougat) either. At least a migration to /e/ OS Oreo 8.1.0 would be desirable. Even better would be a /e/ OS 9-Pie Build. I console myself with very well working LOS 17.1 builds as a compromise solution.
I suppose it would require a few tweaks, but I imagine this would make it possible to use this unofficial build to upgrade the Samsung Galaxy S6 Edge to Q ? If not possible, there is also an unofficial LineageOS 16.0 build by the same developper.