I can not fish rare items

So I enchanted my fishing rod with luck of the sea three and I left it for a couple hours afk fishing and I got only raw cod, tropical fish, puffer fish, ink sacks, worn leather boots, water bottles, bone, wooden bowls, and one normal fishing rod. and I was wondering what happened to all the rare items you get like saddles and name tags and enchanted books and I thought it might be a bug so please fix this.