You can leash an entity to a fence from 7 blocks away in one direction, but you can't do the same thing in the other direction
[media]
MC-276925
Distance limit of using lead on a fence is directional
Open
1
Can confirm. However, if you leash the boat which is unable to be leashed from that distance closer, and then push it to the same distance as the other side, the lead will not snap.