X-Frame-Options Sharepoint 2019 How to frame it?

Hi Experts

I want to embed an iframe into an HTML page and frame the sharepoint website.

Unfortunately this is not allowed and it gives me an error.

I tried to finde and change the IIS but can't. Do i have to change it inside of Sharepoint or is it a server problem. I use Sharepoint 2019 on-premise.

Where can i cange the X-Frame-Options to allow-from?

thanks alot