Allow to show my wordpress site in iframe

Hi @progameinc
This is more a question about Apache than about WordPress.

You can’t display your website inside an iframe outside your domain name because your site has this header in place
x-frame-options: SAMEORIGIN
Screenshot: https://i.imgur.com/BYC45ox.jpg

You can try adding this to your .htaccess file:

Header always unset X-Frame-Options
Header set Content-Security-Policy "frame-ancestors 'self' https://www.example.org"

The first rule will unset the X-Frame-Options, we are doing this because this header is no longer supported in newer browsers.

With the second rule, we are indicating that the pages can be framed in the same domain and in https://www.example.org domain. Replace example.org for the desired domain where your site will be framed.

Let me know if this works for you.

If you want to know more, here are a few links:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy/frame-ancestors