Hi There,
Thanks for writing in!
As mention, your site is working as it was before but you can’t see the code in the customizer.
Can you please confirm if you have added the JS or CSS specific to any page or you have added in X-> Theme Option -> Global JS/CSS ?

Sometimes it causes due to several reasons.
Caching. If you have a caching plugin activated or any form of server side caching please disable it to test for any possible conflicts. If you have server side caching or aren’t sure if you do, your host should be able to advise of this and disable it for testing purposes on your account.
Cloudflare. If you are using Cloudflare please disable this for testing purposes. Cloudflare by default enables an auto minfication function to compress the JS and CSS files of the theme. As the theme already serves minified files, re-minifying said files only causes to break the entire site.
Custom code syntax error. If you have a child theme, please enable the child theme and check if the issue still exists. If you have entered any custom JS or CSS into their respective editors. Please review the code for any syntax errors. A mis-placed semi-colon or a missing bracket will cause the issue you’re seeing.
If you could please try the above and if you still have the issue we’d be more than happy to assist.
Please provide following information:
Set it as Secure Note
- Link to your site
- WordPress Admin username / password
For your other question, I have seen you have created 17 posts in the forum and all of them is there.

Just go to Dashboard -> Profile you will find all of your post there.
Thanks