I wrote below trigger

exports.onNewGameRequest = onValueCreated(
{ref: "/game_requests/{uid}", region: "europe-west1"},
async (event) => {
  // Grab the current value of what was written to the Realtime Database.
  const original = event.data.val();
  console.log("onNewGameRequest", event.params.pushId, original);
  // make matches
  return await makeMatches();
},);

It never gets executed when I insert a new entry to “game_requests” collection.

Any ideas why?