No it's not really the end of the novel..I've read the novel..When they know that she was the emperor's daughter, it was the end of season 1 (she is still a child in that) Also, it was almost the end of available (free) translated chapters. There's still another season where I think she is an adult but I can't read that since it's a paid chapter
Here's the link if you want to read the novel: https://novelishuniverse.com/can-i-cry-now/
The actual reveal is on chapter 169..

It’s a really, really sweet story but knowing that they only find out, at the end of the story, that the FL is the emperor’s daughter— according to the spoilers I’ve read about the novel, is really sad and something I slightly criticize? Because why does it take so long to figure out? Some of them are already suspicious about her origins
But that’s just my opinion^^