julienmonnerie/kirby/config/sections/mixins/min.php

<?php

return [
	'props' => [
		/**
		 * Sets the minimum number of required entries in the section
		 */
		'min' => function (int|null $min = null) {
			return $min;
		}
	],
	'methods' => [
		'validateMin' => function () {
			if ($this->min && $this->min > $this->total) {
				return false;
			}

			return true;
		}
	]
];