The block you are using set the container to inline-block which will not go full width.
This CSS should override the CSS from the block, give it a try:
.gutentor-element-list ul:not(.list-indicator-image):not(.list-indicator-icon) li span {
display: block;
}
.gutentor-element-list ul:not(.list-indicator-image):not(.list-indicator-icon) li span p {
display: flex;
flex-direction: column;
}
You’ll see gaps between lines, that’s the <br>
elements.