To hide Publish Date and add Updated date, like this.
#1. First, use this code to Custom CSS
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/* last updated */
.blog-meta-item--date {
display: none !important;
}
.blog-meta-item--last-update {
margin-right: 15px;
display: inline-block;
}
#2. Next, use this code to Code Injection > Footer
<script>
document.addEventListener('DOMContentLoaded', function() {
if (document.querySelector('.blog-item-top-wrapper')) {
var publishDate = document.querySelector('.blog-meta-item--date');
if (publishDate) {
publishDate.style.display = 'none';
}
var authorDiv = document.querySelector('.blog-meta-item--author');
if (authorDiv && publishDate) {
var dateText = publishDate.querySelector('span').textContent;
var lastUpdateElement = document.createElement('div');
lastUpdateElement.className = 'blog-meta-item blog-meta-item--last-update';
lastUpdateElement.innerHTML = 'Updated: ' + dateText;
authorDiv.parentNode.insertBefore(lastUpdateElement, authorDiv);
}
}
});
</script>
#3. You can change Updated text here.