How to send notification based on logged in user mail credential - laravel

Question

I am using Laravel 8 for an HRMS application. It has multiple companies, and each user belongs to a company. Initially, I was using it for a single company. But now, it's for multiple companies with a singular database. The user table has company_id.
Models
class Company extends Model
{
protected $table = 'companies';
protected $fillable = [
'id',
'organization_code',
'organization_name'
];
}
class User extends Authenticatable
{
use Notifiable;
protected $fillable = [
'name',
'first_name',
'last_name',
'company_id',
'email',
];
}
config/mail.php
return [
'driver' => env('MAIL_DRIVER', 'smtp'),
'host' => env('MAIL_HOST', 'smtp.office365.com'),
'port' => env('MAIL_PORT', 587),
'from' => [
'address' => env('MAIL_FROM_ADDRESS', 'admin#company1.com'),
'name' => env('MAIL_FROM_NAME', 'COMPANY1'),
],
'encryption' => env('MAIL_ENCRYPTION', 'tls'),
'username' => env('MAIL_USERNAME','mailer#company1.com'),
'password' => env('MAIL_PASSWORD','company1'),
'sendmail' => '/usr/sbin/sendmail -bs',
'log_channel' => env('MAIL_LOG_CHANNEL'),
];
The above mail credential is for the company1, but now I have company1, comany2, company3, ... and so on. Each company will have its mail credential.
$details = [
'subject' => '',
'greeting' => '',
'body' => ' ',
'line1' => '',
'thanks' => 'Thank you!',
'user_email' => $userEmail,
'actionText' => '',
];
Notification::route('mail', $details['user_email'])
->notify(new \App\Notifications\UserApprove($details))
How do I send the notification based on the mail credential of the company of the logged-in user?