On before the picture is not displayed, what could be the gap?

Question

Layout

on before the picture is not displayed, what could be the gap? positioning for the parent (in my case it's a link) is written and it's set to before absolute.
a{
margin-bottom: 22px;
padding-left: 25px
color: #3a4248;
text-decoration: none;
display:block;
position: relative;
&::before{
content: "";
background-image: url("../../images/map-marker.svg");
width: 20px
height: 20px;
display:block;
position: absolute;
left: 0;
}
}
I don't understand what the problem is