Note: This only works on Flows using the Grid theme. If you don't see the 'Show more' button, make sure that you have turned off 'Infinite scroll' in the Flow's Styling settings, under 'General'.
To change the color and design of the 'Show more' button, paste this CSS code in your 'Custom CSS' in Setup & Styling first.
Select the color for both background and text that you want with your own color code.
In this snippet, there are rounded corners with border-radius – if you don't want that, don't include that part in your code:
.bzfy-t-feed-tile-grid .bzfy-c-tilegrid-button--dark {
color: #000;
background-color: #ffffff;
border-radius: 25px;
}
Before:
After: