Define custom load points for Advanced Custom Fields (ACF) JSON files. For more info see https://philkurth.com.au/tips/how-to-get-advanced-custom-fields-to-load-json-files-from-more-than-one-directory/

add-all-sub-directories-as-acf-json-load-points.php

<?php

add_filter( 'acf/settings/load_json', function ( array $directories ) {

	$base_dir = get_stylesheet_directory() . '/components';
	$resource = opendir( $base_dir );

	while ( ( $file = readdir( $resource ) ) !== false ) {

		// Skip current and parent directory references
		if ( in_array( $file, array( '.', '..' ), true ) ) {
			continue;
		}

		// Get the full path
		$dir = "$base_dir/$file";

		// If we have a directory (not a file) add it to our ACF JSON load paths
		if ( is_dir( $dir ) ) {
			$directories[] = $dir;
		}
	}

	closedir( $resource );

	return $directories;
} );

custom-acf-json-load-points.php

<?php

add_filter( 'acf/settings/load_json', function ( array $directories ) {

	// Define as many directories as necessary. ACF will look in each
	// directory and load any JSON files it finds. 
	
	$directories[] = get_stylesheet_directory() . '/components/one';
	$directories[] = get_stylesheet_directory() . '/components/two';
	$directories[] = get_stylesheet_directory() . '/components/three';

	return $directories;
} );