Two buttons on List Slideshow

#1. First, you need to find Slideshow ID
In my example, it is:

section[data-section-id="67201c9b8db1174e75e07ed2"]

#2. Next, edit Slideshow > Add a hyperlink (we will use code to change this to button).
Suppose it will have text/url: Purchase – /purchase

#3. Use this code to Custom CSS box.

section[data-section-id="67201c9b8db1174e75e07ed2"] {
    p a[href="/purchase"] {
    border: 2px solid #000;
    display: inline-block;
    background-color: #000;
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 50px
}
    p a[href="/purchase"]:hover {
        background-color: #fff;
        color: #000;
    }
}

#4. Result