You, the viewer, are actually ahead of the characters. When dramatic irony crops up, it's usually not to let us feel smugly superior. If we're lucky, the emotion being manipulated will be amusement.
This is a list of live action LGBT characters in television and radio.
Cheryl has kissed several males on the show, but has had no formal relationship with any of them.
After going to see Love, Simon with Toni Topaz, she admits that she previously loved a friend named Heather when she was in junior high.
A character's Hidden Depths are often a source of Dramatic Irony.
A favorite trick of time-travel or historical works; see It Will Never Catch On.