Can’t change color of selected text

I can’t change the background color of highlighted text.
I’ve tried this in twenty nineteen and seventeen. There my code works completely fine.

How do I change it in twentytwenty? Also can’t find anything in the theme files.

My css:

::-moz-selection {
background-color: #f2e600 !important;
color: #000;
}

::selection {
background-color: #f2e600;
color: #000;
}

Any ideas what blocking it?
Also !important doesn’t help.