Following, because all I know of is the ones by Sacrificial (passionate romance, slow dancing, and skygazing). They are helpful, over nothing at all, and yes, romance in Sims 4 is basically absent...it's all about being friends with benefits xD like, hey, I like you, let's bump uglies. Wahoo! Go Team, YEAH! *snort*
Nothing wrong with friends-with-benefits, but..there's more to life. But what sort of romance interactions would you like to see, that aren't in Passionate Romance, then? One I wish existed, is cuddling in bed. Unfortunately, being in bed together means lying in parallel, as if they were in two twin beds pushed together and even had separate blankets.