Why didn't Boruto teleport to the animal world?
The episode you are referring to when Jiraya was teleported to Mount Myōboku, Tales of a Gutsy Ninja ~Jiraiya Ninja Scroll~ Part 1 is actually a filler episode, so I'm not sure if teleporting to the animal's home after performing the Summoning Technique without a blood contract should be considered canon.


  In the anime, it was shown that if a user attempts to summon an animal without first signing a contract, the user will be teleported to the home of the animal they have a natural affinity for


On the other side, nothing happened when Boruto performed the Summoning Technique because, not only did he not have a blood contract, he also did not use the hand signs required to perform a summon


  However in Boruto's case, he neither used a blood sacrifice nor did the necessary hand seals.


Without the hand signs or blood sacrifice, Boruto just kind of slapped his hand on the ground.