Add all files

app/Admin/Resources/CouponResource/RelationManagers/ServicesRelationManager.php

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+<?php
+
+namespace App\Admin\Resources\CouponResource\RelationManagers;
+
+use App\Admin\Resources\ServiceResource;
+use Filament\Resources\RelationManagers\RelationManager;
+use Filament\Tables;
+use Filament\Tables\Table;
+
+class ServicesRelationManager extends RelationManager
+{
+    protected static string $relationship = 'services';
+
+    public function table(Table $table): Table
+    {
+        return $table
+            ->recordTitleAttribute('id')
+            ->columns([
+                Tables\Columns\TextColumn::make('id'),
+                Tables\Columns\TextColumn::make('order.user.name')->label('User'),
+                Tables\Columns\TextColumn::make('product.name')->label('Product'),
+            ])
+            ->filters([
+                //
+            ])
+            ->headerActions([])
+            ->actions([
+                Tables\Actions\Action::make('view')
+                    ->label('View')
+                    ->url(fn ($record) => ServiceResource::getUrl('edit', ['record' => $record])),
+            ])
+            ->bulkActions([
+                Tables\Actions\BulkActionGroup::make([
+                    Tables\Actions\DeleteBulkAction::make(),
+                ]),
+            ]);
+    }
+}