src/main/java/net/trueog/utilitiesog/Listeners/NoAdvancementsInCreativeListener.java

@@ -0,0 +1,17 @@
+package net.trueog.utilitiesog.Listeners;
+// Import libraries.
+import com.destroystokyo.paper.event.player.PlayerAdvancementCriterionGrantEvent;
+import org.bukkit.GameMode;
+// Hook into Bukkit's Listener.
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+
+public class NoAdvancementsInCreativeListener implements Listener {
+    @EventHandler(priority = EventPriority.HIGHEST)
+    public void onAdvancementProgress(PlayerAdvancementCriterionGrantEvent event) {
+        if (event.getPlayer().getGameMode() != GameMode.SURVIVAL) {
+            event.setCancelled(true);
+        }
+    }
+}

src/main/java/net/trueog/utilitiesog/UtilitiesOG.java

@@ -19,6 +19,7 @@ import net.luckperms.api.model.user.User;
 import net.luckperms.api.node.Node;
 import net.luckperms.api.node.types.PrefixNode;
 import net.trueog.utilitiesog.Listeners.DisableEntityCrammingListener;
+import net.trueog.utilitiesog.Listeners.NoAdvancementsInCreativeListener;
 import net.trueog.utilitiesog.Listeners.NoFlippyListener;
 import net.trueog.utilitiesog.Listeners.TogglePhantomsListener;
 import net.trueog.utilitiesog.commands.AboutCommand;
@@ -183,6 +184,11 @@ public final class UtilitiesOG extends JavaPlugin {
             this.getCommand("togglephantoms").setExecutor(new TogglePhantomsCommand());
         }
 
+        if (this.getConfig().getBoolean("NoAdvancementsInCreative")) {
+
+            getServer().getPluginManager().registerEvents(new NoAdvancementsInCreativeListener(), this);
+        }
+
         this.getCommand("utilities").setExecutor(new AboutCommand());
     }
 

src/main/resources/config.yml

@@ -16,4 +16,6 @@ TogglePhantoms: true
 # A /ping command that returns a player's real ping, in addition to a /bing command that replicates the functionality of the default /ping command. Default: true.
 Ping: true
 # Displays information to the player about the ranks available at the TrueOG Network Store (https://store.true-og.net/). Default: true.
-RanksMenu: true
+RanksMenu: true
+# Should players earn advancements in non survival game modes?
+NoAdvancementsInCreative: true