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function is not described

_restore_wpautop_hook() WP 5.0.0

for subsequent the_content

This is an internal function for using it by WP core itself. It's not recommended to use this function in your code.

No Hooks.

Return

String. The unmodified content.

Usage

_restore_wpautop_hook( $content );
$content(string) (required)
The post content running through this filter.

Code of _restore_wpautop_hook() WP 5.8.3

function _restore_wpautop_hook( $content ) {
	$current_priority = has_filter( 'the_content', '_restore_wpautop_hook' );

	add_filter( 'the_content', 'wpautop', $current_priority - 1 );
	remove_filter( 'the_content', '_restore_wpautop_hook', $current_priority );

	return $content;
}