Defaulting a field to UUID()

• Create a Plain Text field
• Under Field Options > Advanced, set Default Value to {@ID,UUID} —?this means use a function UUID() which takes the post ID as its parameter.
• In wp-config.php, set define( 'PODS_SHORTCODE_ALLOW_EVALUATE_TAGS', true );
• In a plugin or your theme’s functions.php, define a function UUID( $post_id ), which takes the Post ID as an argument and returns your desired UUID. For example:

<?php

function UUID( $post_id ) {
	return md5( $post_id );
}

can just use the wp_generate_uuid4() instead of using a custom function

Give it a try. It might not work because that function does not take a parameter. If it throws an error, write a function that takes one argument but returns wp_generate_uuid4().

Thanks worked out fine by return the wp_generate_uuid4() in the UUID function