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Hi, I just wanted to follow up on this PR as I put it in some time ago. Is there any feedback or could this code be approved and merged as is? Thanks!

@mauteri,

Considering that the search query can be modified via the HTTP API filter, I am unsure how helpful the new filter would be.

Additionally, whole-term selector components can be replaced via the editor.PostTaxonomyType filter, which provides more flexibility.

Example filter

add_filter( 'rest_post_tag_query', function( $query_args, $request ) {
	// Only modify search query.
	if ( ! isset( $query_args['search'] ) ) {
		return $query_args;
	}

	// Display most used tags first.
	$query_args['order']   = 'desc';
	$query_args['orderby'] = 'count';

	return $query_args;
}, 10, 2 );

That makes sense. I'll close this PR. Thx!