How to show a copy of the site on another site?

Question

htaccess

2 identical sites on one account:
/www/site1.com
/www/site2.com
They are completely identical, and when editing, you need to go through each with the same edits .. tired.

Is it possible through htaccess to show the content of site1.com when visiting site2.com as well?

What other options are there?

Answer 1

And why can't one be appointed as the main mirror and glued together? The site will be accessible by both names, but lead to one site. Will this solution suit you?