Currently, players who do not know that the mod is installed may have a frustrating experience when trying to move entities through fence gates. This could be avoided by adding a notification shown when a player first passes/places a fence gate. Options will have to be investigated but from the top of my head, I a few possibilities:

1. Using an advancement
   Does probably not work when the mod is only on the server unless we can transmit this via datapacks somehow. If that's possible, this is probably the best option.
2. Using a tutorial hint
   I have no idea how easy to mod these are and how much information they can convey since they seem somewhat limited.
3. Using a chat message
   Initially, this looks like the only option when running the mod on the server only (which is possible albeit discouraged to prevent desync).