Librarians in Bedrock Realms Dont offer Trident enchantments

I have been trading with villagers in a bedrock realm server for several hours over a few days now. Ive been trying to acquire an Impaling V or Impaling IV enchantment book from a librarian. After all this time i have noticed that the only enchantments not offered by librarians are those for a Trident. I think its also important to note that im trying to acquire these trades in the nether. I cant get villagers to link in the overworld due to the other bugs with villagers at the moment.