Use this code to Code Injection – Footer
Replace with your desired URL + logo image URL
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.0/jquery.min.js"></script>
<script>
$(document).ready(function(){
$('<a href="https://carolinerohwer.com" class="custom-logo"><img src="https://cdn.pixabay.com/photo/2023/07/12/17/23/activity-8122959_1280.jpg" width="100px"/></a>').insertAfter('.header-title a');
});
</script>
<style>
a.custom-logo img {
width: 100px !important;
height: auto !important;
max-height: unset !important;
}
</style>

Result:
