#1. First, use Squarespace ID Finder to find the ID of the Button Block
In my example, we will have:
#block-yui_3_17_2_1_1717399220695_40609
#2. Use this code to Custom CSS box
/* Hide button initial */ div#block-yui_3_17_2_1_1717399220695_40609 { display: none; }
#3. Use this code to Website Tools > Code Injection > Footer (or Page Header Code Injection)
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.0/jquery.min.js"></script> <script> $(document).ready(function () { setTimeout(function(){ $('div#block-yui_3_17_2_1_1717399220695_40609').fadeIn(500); }, 5000); }); </script>