Display custom field from the front page on another page

$val = get_post_meta( get_the_ID(), 'meta_data_name', true );
echo $val;

You can replace get_the_ID() with the ID of the post you are getting the meta from.

You could possible team this with:

$frontpage_id = get_option('page_on_front');

to get the homepage ID. Not sure if this would be friendly with multisite though.

the_field() is an Advanced Custom Fields function, this can take a second parameter. You can also achieve the same as the above:

<?php the_field($field_name, $post_id); ?>

replacing post ID with the ID of the post you are retrieving the data from.

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