i know that the addon was created primarly for wotlk/cataclysm but in wow sod the addon doesnt show any other options of highlighting except the proc of nightfall+ shadowbolt. can we have more options here? or is it bugging?

Hi and thank you for your feedback. As opposed to Wrath and Cataclysm, there aren't many things to track for Warlocks in Season of Discovery. Fortunately, phase 4 was generous for Warlocks, and the addon will support more effects in the near future, as detailed in #331.