.block-editor-list-view-block__contents-cell[aria-selected='true'] {
    a[aria-label='Google Map'] {
        svg {
            path {
                stroke: #fff;
            }
        }
    }
}

.wp-block-gmap-gmap-block {
    border: 1px solid #395ae9;
    padding: 10px;
    box-sizing: border-box;
}