service class that handles saving and sending email then rewrite the store method

CustomerController.php

<?php

namespace App\Http\Controllers;
use App\Providers\CustomerServiceProvider;
use Illuminate\Http\Request;
use App\Models\Customer;
use Validator;

class CustomerController extends Controller
{
    public function index()
    {
        return view ('customer.index');
    }
    public function store(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'name' => 'required|max:255',
            'email' => 'required|email|unique:App\Models\Customer',
        ]);

        if ($validator->fails()) {
            $errors = $validator->messages()->getMessages();
            return Response()->json(['status' => false, 'message' => 'Something Went Wrong', 'response' => ['errors' => $errors]], 401);
        };

        // Get only email and name of the customer from request
        $data = $request->only('name', 'email');

        // Save Customer Data
        $customer = CustomerServiceProvider::saveData($data);
        if($customer){
            // Send email to the request customer
            CustomerServiceProvider::sendEmail($data);
            return Response()->json(['status' => true, 'message' => 'Successfuly Inserted', 'response' => ['data' => $customer]], 200);
        }
        return Response()->json(['status' => false, 'message' => 'Something Went Wrong', 'response' => []], 401);
    }

}

CustomerServiceProvider.php

<?php
namespace App\Providers;

use App\Models\Customer;
use Illuminate\Support\Facades\Mail;
use App\Mail\WelcomeNewCustomer;

class CustomerServiceProvider {

    public static function saveData($data)
    {
        $customer = new Customer();
        $customer->name = $data['name'];
        $customer->email = $data['email'];
        return $customer->save() ? $customer : false;
    }
    public static function sendEmail($data)
    {
        Mail::to($data['email'])->send(new WelcomeNewCustomer());
    }

}