laravel 9 Mailable with Attachment::fromData

I'm getting an error, the mailler thinks it a string

Object of class Barryvdh\DomPDF\PDF could not be converted to string

I really don't want to be saving the pdf to the server, I want to make one and just send. Any thoughts on this would be a great help

My Controller.. [code] $data = [ 'id' => $Transactions->id, 'Who_1' => $Transactions->shipping_address, 'row_item' => $lineitem, 'amount' => $Transactions->amount, 'The_Date' => \Carbon\Carbon::parse($Transactions->created_at)->format('d/m/Y'),

            'total'       => $Transactions->amount,
            'vat'         => request('b_vat'),
            'grand_total' => $Transactions->total,
        ];

        //return view('users.pdf', $data);

        $pdf_Data    = PDF::loadView('frontend.shared.pdf', $data);

        Mail::to(request('b_email'))->send(new \App\Mail\UserOrderVouchers(request('b_f_name'), request('b_email'), $company->email, $subject, $body, $company->name, $pdf_Data));

[/code]

My Mailable looks like... namespace App\Mail;

use Illuminate\Bus\Queueable; use Illuminate\Contracts\Queue\ShouldQueue; use Illuminate\Mail\Mailable; use Illuminate\Mail\Mailables\Content; use Illuminate\Mail\Mailables\Envelope; use Illuminate\Queue\SerializesModels; use Illuminate\Mail\Mailables\Attachment; use Illuminate\Mail\Mailables\Address;

class UserOrderVouchers extends Mailable{ use Queueable, SerializesModels;

public $name, $email, $company_email, $subject, $body, $company_name, $attachfileName;
public function __construct($name, $email, $company_email, $subject, $body, $company_name, $attachfileName){
    $this->name = $name;
    $this->email = $email;
    $this->company_email = $company_email;
    $this->subject = $subject;
    $this->body = $body;
    $this->company_name = $company_name;
    $this->attachfileName = $attachfileName;
}


public function envelope(){
    return new Envelope(
        from: new Address($this->company_email, $this->company_name),
        subject: 'Order Vouchers',
        tags: ['Order Vouchers'],
    );
}


public function content(){
    return new Content(
        html: 'emails.user_vouchers_email',
    );
}

public function attachments(){
    return [
        Attachment::fromData(fn () => $this->attachfileName, 'Report.pdf')
            ->withMime('application/pdf'),
    ];
}

}