Hi
The top part of article is set to be aligned in center. You can override with this custom css:
.item-page.layout-default.no-sidebar .top-article-info {
text-align: inherit !important;
}
.item-page.layout-default.no-sidebar .top-article-info .article-aside, .item-page.layout-default.no-sidebar .top-article-info .article-info, .item-page.layout-default.no-sidebar .top-article-info .bottom-meta {
justify-content: flex-start !important;
}