better for security but worse for SEO?

Hello, with purpose of improving the safety of some WordPress, I installed WordPress in a different directory and I’ve put a name like Fder32 to this folder.

So that the web does not appear as https://www.mysite.com/Fder32, I have doubled index.php and .htaccess from within the “Fder32” folder to the root directory.

After I changed into index.php these lines:

require (‘./ wp-blog-header.php’);

to

require (‘./ Fder32 / wp-blog-header.php’);

Then in the administration panel (www.mysite.com/Fder32/wp-admin) I go to Options and put the WordPress address (URL) is https://www.mysite.com/Fder32/ and blog address (URL) is https://www.mysite.com/

So far so good.

But I have a question:

How does this take the search engines?

What impact has this action for the purpose of SEO?

Is it better for security but worse for SEO?

Thank you.