Made changes to the title and the question itself. Thanks @SeVlad, we managed to reach the right solution.
A small site was translated to Wordpress with bare HTML. There is a separate page for feedback with comments. HTML visitors' comments were recorded manually on the site by a copy-paste from e-mail (the form was not, the site was static). Comments in this format are still preserved, it is undesirable to throw them away.
Now, any comment that would be convenient to simply “approve” in the WP console, you have to copy-paste again, and then delete, otherwise you can see where the old comments are, and where they are added through the form, it looks very rough. How to add all the old comments, as if they were also entered through the form?