¯\_(ツ)_/¯

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1) You can add the following code to the Dashboard > DW Focus > General > Custom CSS:

.archive .entry-meta span.posted-on {
    display: none;
}

2) You can use the following code in Cusstom CSS:

.post-navigation .nav-links .nav-previous:before {
    content: "......" !important;
}
.post-navigation .nav-links .nav-next:before {
   content: "......" !important;
}

3) Please tell me detail about this issue. I’m still vague about it.
Regards,

2) You can open the \wp-content\themes\dw-focus\assets\css\dw-focus.css file. Find the line 10728.
3) If you want to display the post only in the specific categories, you should select only one categories for all the post.

4) To remove the date stamp from the comments section, you can add the following code to the Custom CSS:
.single-post .comment-meta time { display: none; }
Regards,

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2) Please try add the following code to the style.css file:

.post-navigation .nav-links .nav-previous:before {
    content: "...." !important;
}
.post-navigation .nav-links .nav-next:before {
   content: "....." !important;
}

Or you can change the codes line in the dw-focus.min.css file.
Hope this helps !

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