re-add LetsExchange

lib/cake_pay/src/auth/cake_pay_welcome_page.dart

@@ -117,7 +117,7 @@ class CakePayWelcomePage extends BasePage {
     final verified = await Navigator.pushNamed<bool>(context, Routes.cakePayVerifyOtpPage,
         arguments: [authViewModel.email, true]);
 
-    if (verified == true) {
+    if (verified == true && Navigator.of(context).canPop()) {
       Navigator.pop(context, true);
     }
   }

lib/view_model/exchange/exchange_view_model.dart

@@ -184,6 +184,7 @@ abstract class ExchangeViewModelBase extends WalletChangeListenerViewModel with
         ChainflipExchangeProvider(tradesStore: trades),
         if (FeatureFlag.isExolixEnabled) ExolixExchangeProvider(),
         SwapTradeExchangeProvider(),
+        LetsExchangeExchangeProvider(),
         StealthExExchangeProvider(),
         XOSwapExchangeProvider(),
         TrocadorExchangeProvider(