Fix wifi disconnect issue?

modules/networking.nix

@@ -1,13 +1,19 @@
 { ... }:
 
 {
-  networking.hostName = "nixos";
+  networking = {
-  networking.wireless = {
+    hostName = "nixos";
+    wireless = {
       iwd = {
         enable = true;
       };
+
     };
-  networking = {
+
+    networkmanager = {
+      wifi.backend = "iwd";
+    };
+
     nftables.enable = true;
     firewall.enable = true;
   };