Web Publishing via FlutterFlow with Custom Headers

Hi Community,

I am trying to add custom headers to my web published app.

I have added the following custom headers:
<meta http-equiv="Content-Security-Policy" content="default-src 'self'">

<meta http-equiv="Permissions-Policy" content="default-src 'self'">

<meta http-equiv="Referrer-Policy" content="no-referrer">

<meta http-equiv="Strict-Transport-Security" content="max-age=31536000; includeSubDomains">

<meta http-equiv="X-Content-Type-Options" content="nosniff">

<meta http-equiv="X-Frame-Options" content="DENY">

But when I scan the FlutterFlow published url (example: https://myapp.flutterflow.app) with securityheaders.com it still says those headers are missing.

Any advice and opinions are welcome and would be appreciated.

Thanks in advance.
Regards,
Devin