You could put it in a <span> with a bigger font but the same line-height.

You can also try BLACK CIRCLE &#x25cf; ●.
I don't know how many platforms that will work on, though.


Easy my friend! Check this:

ul{
    list-style-type: none;
    margin-left: 0;
    padding-left: 0;
}
ul li::before {
    content: "● ";
    color: #2C92C5;
    padding-right: 5px;
}

You can also set the font-size in CSS higher:

.bullelements{
  font-size:2rem;
}
<html>
  <head>
  </head>
  <body>
  ...<span class="bullelements">&bull;</span>
  </body>
</html>

Now you can set the font-size to your size.